diff --git a/src/app/activity/page.tsx b/src/app/activity/page.tsx
index c77799b..86d4a13 100644
--- a/src/app/activity/page.tsx
+++ b/src/app/activity/page.tsx
@@ -2,6 +2,7 @@
 
 import { useState, useEffect } from "react";
 import Link from "next/link";
+import { useFamily } from "../FamilyProvider";
 
 type ViewMode = "timeline" | "calendar";
 type LogType = "feed" | "sleep" | "diaper";
@@ -29,33 +30,23 @@ interface DayLogs {
 }
 
 export default function ActivityPage() {
+  const { child, childId: providerChildId, familyId } = useFamily();
   const [view, setView] = useState<ViewMode>("timeline");
   const [logs, setLogs] = useState<Log[]>([]);
   const [loading, setLoading] = useState(true);
   const [filter, setFilter] = useState<LogType | "all">("all");
-  const [child, setChild] = useState<Child | null>(null);
   const [showSuggested, setShowSuggested] = useState(true);
   const [generating, setGenerating] = useState(false);
-  const childId = "default";
+  const childId = providerChildId || "default";
 
   useEffect(() => {
-    fetchLogs();
-    fetchChild();
-  }, []);
-
-  const fetchChild = async () => {
-    try {
-      const res = await fetch("/api/children?familyId=default");
-      const data = await res.json();
-      if (data.children?.length > 0) {
-        setChild(data.children[0]);
-      }
-    } catch (err) {
-      console.error("Failed to fetch:", err);
+    if (providerChildId) {
+      fetchLogs();
     }
-  };
+  }, [providerChildId]);
 
   const fetchLogs = async () => {
+    if (!childId) return;
     try {
       const res = await fetch(`/api/logs?childId=${childId}&limit=100`);
       const data = await res.json();
diff --git a/src/app/ai/page.tsx b/src/app/ai/page.tsx
index e6b7fbd..da38ce9 100644
--- a/src/app/ai/page.tsx
+++ b/src/app/ai/page.tsx
@@ -1,6 +1,7 @@
 "use client";
 
 import { useState, useEffect } from "react";
+import { useFamily } from "../FamilyProvider";
 
 interface AIChat {
   id: string;
@@ -18,7 +19,7 @@ interface ChatSession {
 }
 
 export default function AIChatPage() {
-  const childId = "default";
+  const { childId } = useFamily();
   const [sessions, setSessions] = useState<ChatSession[]>([]);
   const [currentSessionId, setCurrentSessionId] = useState<string>("");
   const [input, setInput] = useState("");
@@ -26,10 +27,13 @@ export default function AIChatPage() {
   const [sidebarOpen, setSidebarOpen] = useState(true);
 
   useEffect(() => {
-    fetchSessions();
-  }, []);
+    if (childId) {
+      fetchSessions();
+    }
+  }, [childId]);
 
   const fetchSessions = async () => {
+    if (!childId) return;
     try {
       const res = await fetch(`/api/chat?childId=${childId}`);
       const data = await res.json();
diff --git a/src/app/api/auth/profile/route.ts b/src/app/api/auth/profile/route.ts
index b57a975..e987a41 100644
--- a/src/app/api/auth/profile/route.ts
+++ b/src/app/api/auth/profile/route.ts
@@ -1,29 +1,96 @@
 import { NextResponse } from "next/server";
+import { sql } from "@/db";
+import { cookies } from "next/headers";
 
-// Mock user for now - in production, fetch from database
+// GET current user profile from session
 export async function GET() {
   try {
-    // TODO: In production, get user from session
-    const user = {
-      id: "1",
-      name: "Parent",
-      email: "parent@example.com",
-    };
+    const cookieStore = await cookies();
+    const sessionToken = cookieStore.get("tia_session")?.value;
 
-    return NextResponse.json({ user });
+    if (!sessionToken) {
+      return NextResponse.json({ error: "Not authenticated" }, { status: 401 });
+    }
+
+    // Get session and user
+    const sessions = await sql`
+      SELECT s.user_id, s.expires, u.id, u.email, u.name, u.created_at
+      FROM sessions s
+      JOIN users u ON u.id = s.user_id
+      WHERE s.session_token = ${sessionToken}
+        AND s.expires > NOW()
+    `;
+
+    const session = sessions?.[0];
+
+    if (!session) {
+      return NextResponse.json({ error: "Invalid session" }, { status: 401 });
+    }
+
+    // Get family info
+    const members = await sql`
+      SELECT fm.family_id, f.name as family_name
+      FROM family_members fm
+      JOIN families f ON f.id = fm.family_id
+      WHERE fm.user_id = ${session.user_id}
+    `;
+
+    return NextResponse.json({
+      user: {
+        id: session.id,
+        email: session.email,
+        name: session.name || "Parent",
+        familyId: members?.[0]?.family_id,
+        familyName: members?.[0]?.family_name,
+        memberSince: session.created_at,
+      },
+    });
   } catch (error) {
+    console.error("Profile fetch error:", error);
     return NextResponse.json({ error: String(error) }, { status: 500 });
   }
 }
 
+// UPDATE user profile (name only)
 export async function POST(request: Request) {
   try {
     const body = await request.json();
     const { name } = body;
 
-    // TODO: Save to database in production
+    if (!name) {
+      return NextResponse.json({ error: "Name required" }, { status: 400 });
+    }
+
+    const cookieStore = await cookies();
+    const sessionToken = cookieStore.get("tia_session")?.value;
+
+    if (!sessionToken) {
+      return NextResponse.json({ error: "Not authenticated" }, { status: 401 });
+    }
+
+    // Get user from session
+    const sessions = await sql`
+      SELECT s.user_id
+      FROM sessions s
+      WHERE s.session_token = ${sessionToken}
+        AND s.expires > NOW()
+    `;
+
+    const session = sessions?.[0];
+
+    if (!session) {
+      return NextResponse.json({ error: "Invalid session" }, { status: 401 });
+    }
+
+    // Update user name
+    await sql`
+      UPDATE users SET name = ${name}, updated_at = NOW()
+      WHERE id = ${session.user_id}
+    `;
+
     return NextResponse.json({ success: true, name });
   } catch (error) {
+    console.error("Profile update error:", error);
     return NextResponse.json({ error: String(error) }, { status: 500 });
   }
 }
\ No newline at end of file
diff --git a/src/app/family/page.tsx b/src/app/family/page.tsx
index 0033c8f..317715c 100644
--- a/src/app/family/page.tsx
+++ b/src/app/family/page.tsx
@@ -2,6 +2,7 @@
 
 import { useState, useEffect } from "react";
 import { useRouter } from "next/navigation";
+import { useFamily } from "../FamilyProvider";
 
 interface Child {
   id: string;
@@ -13,6 +14,7 @@ interface Child {
 
 export default function FamilyPage() {
   const router = useRouter();
+  const { familyId, children: childrenFromProvider } = useFamily();
   const [children, setChildren] = useState<Child[]>([]);
   const [loading, setLoading] = useState(true);
   const [editing, setEditing] = useState<string | null>(null);
@@ -23,13 +25,20 @@ export default function FamilyPage() {
   const [newDob, setNewDob] = useState("");
   const [newSex, setNewSex] = useState("male");
 
+  // Load children from FamilyProvider or fetch
   useEffect(() => {
-    fetchChildren();
-  }, []);
+    if (childrenFromProvider && childrenFromProvider.length > 0) {
+      setChildren(childrenFromProvider);
+      setLoading(false);
+    } else if (familyId) {
+      fetchOwnChildren();
+    }
+  }, [childrenFromProvider, familyId]);
 
-  const fetchChildren = async () => {
+  const fetchOwnChildren = async () => {
+    if (!familyId) return;
     try {
-      const res = await fetch("/api/children?familyId=default");
+      const res = await fetch(`/api/children?familyId=${familyId}`);
       const data = await res.json();
       setChildren(data.children || []);
     } catch (err) {
@@ -45,6 +54,7 @@ export default function FamilyPage() {
   };
 
   const saveEdit = async (childId: string) => {
+    if (!familyId) return;
     try {
       const res = await fetch("/api/children", {
         method: "PATCH",
@@ -62,12 +72,12 @@ export default function FamilyPage() {
   };
 
   const addChild = async () => {
-    if (!newName || !newDob) return;
+    if (!newName || !newDob || !familyId) return;
     try {
       const res = await fetch("/api/children", {
         method: "POST",
         headers: { "Content-Type": "application/json" },
-        body: JSON.stringify({ name: newName, birthDate: newDob, sex: newSex, familyId: "default" }),
+        body: JSON.stringify({ name: newName, birthDate: newDob, sex: newSex, familyId }),
       });
       const data = await res.json();
       if (data.success) {
@@ -180,11 +190,9 @@ export default function FamilyPage() {
                       </div>
                     </div>
                   </div>
-                  <div className="flex gap-2">
-                    <button onClick={() => startEdit(child)} className="p-2 text-gray-400">
-                      ✏️
-                    </button>
-                  </div>
+                  <button onClick={() => startEdit(child)} className="p-2 text-gray-400">
+                    ✏️
+                  </button>
                 </div>
               )}
             </div>
diff --git a/src/app/medical/page.tsx b/src/app/medical/page.tsx
index 2cf488d..09fd015 100644
--- a/src/app/medical/page.tsx
+++ b/src/app/medical/page.tsx
@@ -358,7 +358,7 @@ export default function MedicalPage() {
     setShowAddIllness(false);
   };
 
-  const childId = sessionChildId || "default";
+  const childId = sessionChildId;
   const birthDate = child?.birthDate || "2024-01-15";
 
 // Common supplements for babies
diff --git a/src/app/memories/page.tsx b/src/app/memories/page.tsx
index a50097b..d721ec9 100644
--- a/src/app/memories/page.tsx
+++ b/src/app/memories/page.tsx
@@ -2,6 +2,7 @@
 
 import { useState, useEffect, useRef } from "react";
 import Link from "next/link";
+import { useFamily } from "../FamilyProvider";
 
 interface Memory {
   key: string;
@@ -11,18 +12,21 @@ interface Memory {
 }
 
 export default function MemoriesPage() {
+  const { childId } = useFamily();
   const [memories, setMemories] = useState<Memory[]>([]);
   const [selected, setSelected] = useState<Memory | null>(null);
   const [uploading, setUploading] = useState(false);
   const [uploadProgress, setUploadProgress] = useState(0);
   const fileRef = useRef<HTMLInputElement>(null);
-  const childId = "default";
 
   useEffect(() => {
-    fetchMemories();
-  }, []);
+    if (childId) {
+      fetchMemories();
+    }
+  }, [childId]);
 
   const fetchMemories = async () => {
+    if (!childId) return;
     try {
       const res = await fetch(`/api/upload?childId=${childId}`);
       const data = await res.json();
diff --git a/src/app/menu/page.tsx b/src/app/menu/page.tsx
index 99b7799..4202a5a 100644
--- a/src/app/menu/page.tsx
+++ b/src/app/menu/page.tsx
@@ -2,9 +2,11 @@
 
 import Link from "next/link";
 import { useRouter } from "next/navigation";
+import { useState } from "react";
 
 export default function MenuPage() {
   const router = useRouter();
+  const [signingOut, setSigningOut] = useState(false);
 
   const menuItems = [
     { icon: "🏠", label: "Home", href: "/" },
@@ -15,6 +17,18 @@ export default function MenuPage() {
     { icon: "🤖", label: "AI Chat", href: "/ai" },
   ];
 
+  const handleSignOut = async () => {
+    if (!confirm("Are you sure you want to sign out?")) return;
+    setSigningOut(true);
+    try {
+      await fetch("/api/auth/signout", { method: "POST" });
+      router.push("/login");
+    } catch (err) {
+      console.error("Sign out failed:", err);
+    }
+    setSigningOut(false);
+  };
+
   return (
     <div className="min-h-screen bg-gradient-to-br from-rose-50 to-amber-50 dark:from-gray-900 dark:to-gray-800">
       {/* Header */}
@@ -37,8 +51,8 @@ export default function MenuPage() {
         ))}
       </div>
 
-      {/* Bottom Section - Settings only */}
-      <div className="absolute bottom-0 left-0 right-0 p-4">
+      {/* Bottom Section - Settings and Sign Out */}
+      <div className="absolute bottom-0 left-0 right-0 p-4 space-y-2">
         <Link
           href="/settings"
           className="flex items-center gap-4 p-4 bg-white dark:bg-gray-800 rounded-xl"
@@ -46,6 +60,14 @@ export default function MenuPage() {
           <span className="text-2xl">⚙️</span>
           <span className="font-medium">Settings</span>
         </Link>
+        <button
+          onClick={handleSignOut}
+          disabled={signingOut}
+          className="w-full flex items-center gap-4 p-4 bg-red-50 dark:bg-red-900/20 text-red-600 dark:text-red-400 rounded-xl"
+        >
+          <span className="text-2xl">🚪</span>
+          <span className="font-medium">{signingOut ? "Signing out..." : "Sign Out"}</span>
+        </button>
       </div>
     </div>
   );
diff --git a/src/app/profile/page.tsx b/src/app/profile/page.tsx
index 6cfe7fb..736c2cf 100644
--- a/src/app/profile/page.tsx
+++ b/src/app/profile/page.tsx
@@ -28,8 +28,27 @@ export default function ProfilePage() {
   }, []);
 
   const saveProfile = async () => {
-    // TODO: Call API to save profile
-    alert("Profile saved!");
+    if (!name.trim()) {
+      alert("Please enter your name");
+      return;
+    }
+    setLoading(true);
+    try {
+      const res = await fetch("/api/auth/profile", {
+        method: "POST",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify({ name }),
+      });
+      const data = await res.json();
+      if (data.success) {
+        alert("Profile saved!");
+      } else {
+        alert(data.error || "Failed to save profile");
+      }
+    } catch (err) {
+      alert("Failed to save profile");
+    }
+    setLoading(false);
   };
 
   return (
diff --git a/src/app/settings/page.tsx b/src/app/settings/page.tsx
index 1fbf9f8..aa72ca0 100644
--- a/src/app/settings/page.tsx
+++ b/src/app/settings/page.tsx
@@ -68,8 +68,9 @@ export default function SettingsPage() {
   }, [familyId]);
 
   const fetchMembers = async () => {
+    if (!familyId) return;
     try {
-      const res = await fetch(`/api/family/members?familyId=${familyId || "default"}`);
+      const res = await fetch(`/api/family/members?familyId=${familyId}`);
       const data = await res.json();
       setMembers(data.members || []);
     } catch (err) {
@@ -78,8 +79,9 @@ export default function SettingsPage() {
   };
 
   const fetchInvites = async () => {
+    if (!familyId) return;
     try {
-      const res = await fetch("/api/invites?familyId=default");
+      const res = await fetch(`/api/invites?familyId=${familyId}`);
       const data = await res.json();
       setInvites(data.invites || []);
     } catch (err) {
@@ -88,14 +90,14 @@ export default function SettingsPage() {
   };
 
   const sendInvite = async () => {
-    if (!inviteEmail) return;
+    if (!inviteEmail || !familyId) return;
     setInviteLoading(true);
     try {
       const res = await fetch("/api/invites", {
         method: "POST",
         headers: { "Content-Type": "application/json" },
         body: JSON.stringify({
-          familyId: "default",
+          familyId: familyId,
           email: inviteEmail,
           role: inviteRole,
           displayName: inviteEmail.split("@")[0],