diff --git a/app/(app)/ideas/[id]/page.tsx b/app/(app)/ideas/[id]/page.tsx
index 10439f2..d548a81 100644
--- a/app/(app)/ideas/[id]/page.tsx
+++ b/app/(app)/ideas/[id]/page.tsx
@@ -29,6 +29,7 @@ export default async function IdeaDetailPage({ params, searchParams }: PageProps
     include: {
       product: { select: { id: true, name: true, repo_url: true } },
       pbi: { select: { id: true, code: true, title: true } },
+      secondary_products: { include: { product: { select: { id: true, name: true } } } },
     },
   })
   if (!idea) notFound()
diff --git a/app/(app)/ideas/page.tsx b/app/(app)/ideas/page.tsx
index 142e376..1b2c45d 100644
--- a/app/(app)/ideas/page.tsx
+++ b/app/(app)/ideas/page.tsx
@@ -16,7 +16,10 @@ export default async function IdeasPage() {
   const ideas = await prisma.idea.findMany({
     where: { user_id: session.userId, archived: false },
     orderBy: { created_at: 'desc' },
-    include: { product: { select: { id: true, name: true, repo_url: true } } },
+    include: {
+      product: { select: { id: true, name: true, repo_url: true } },
+      secondary_products: { include: { product: { select: { id: true, name: true } } } },
+    },
     take: 200,
   })
 
diff --git a/app/api/ideas/route.ts b/app/api/ideas/route.ts
index 84d1ad7..7da26ac 100644
--- a/app/api/ideas/route.ts
+++ b/app/api/ideas/route.ts
@@ -32,7 +32,10 @@ export async function GET(request: Request) {
       ...(productIdParam ? { product_id: productIdParam } : {}),
       ...(status ? { status } : {}),
     },
-    include: { product: { select: { id: true, name: true, repo_url: true } } },
+    include: {
+      product: { select: { id: true, name: true, repo_url: true } },
+      secondary_products: { include: { product: { select: { id: true, name: true } } } },
+    },
     orderBy: { created_at: 'desc' },
     take: 200,
   })
diff --git a/lib/idea-dto.ts b/lib/idea-dto.ts
index b32d14a..3b6557c 100644
--- a/lib/idea-dto.ts
+++ b/lib/idea-dto.ts
@@ -9,6 +9,7 @@ import type { Idea, IdeaStatus, Product } from '@prisma/client'
 type IdeaWithProduct = Idea & {
   product: Pick<Product, 'id' | 'name' | 'repo_url'> | null
   pbi?: { id: string; code: string; title: string } | null
+  secondary_products?: { id: string; product_id: string; product: { id: string; name: string } }[]
 }
 
 export interface IdeaDto {
@@ -21,6 +22,7 @@ export interface IdeaDto {
   product: { id: string; name: string; repo_url: string | null } | null
   pbi_id: string | null
   pbi?: { id: string; code: string; title: string } | null
+  secondary_products: { id: string; product_id: string; product: { id: string; name: string } }[]
   archived: boolean
   has_grill_md: boolean
   has_plan_md: boolean
@@ -39,6 +41,7 @@ export function ideaToDto(idea: IdeaWithProduct & { status: IdeaStatus }): IdeaD
     product: idea.product,
     pbi_id: idea.pbi_id,
     pbi: idea.pbi ?? null,
+    secondary_products: idea.secondary_products ?? [],
     archived: idea.archived,
     // Geen md-content in lijst-payloads (kan groot zijn) — enkel een vlag.
     has_grill_md: idea.grill_md !== null,
diff --git a/prisma/schema.prisma b/prisma/schema.prisma
index 87f12af..352e5c2 100644
--- a/prisma/schema.prisma
+++ b/prisma/schema.prisma
@@ -188,6 +188,7 @@ model Product {
   claude_questions   ClaudeQuestion[]
   claude_jobs        ClaudeJob[]
   ideas              Idea[]
+  idea_products      IdeaProduct[]
 
   @@unique([user_id, name])
   @@unique([user_id, code])
@@ -416,10 +417,11 @@ model Idea {
   created_at  DateTime   @default(now())
   updated_at  DateTime   @updatedAt
 
-  questions      ClaudeQuestion[]
-  jobs           ClaudeJob[]
-  logs           IdeaLog[]
-  user_questions UserQuestion[]
+  questions          ClaudeQuestion[]
+  jobs               ClaudeJob[]
+  logs               IdeaLog[]
+  user_questions     UserQuestion[]
+  secondary_products IdeaProduct[]
 
   @@unique([user_id, code])
   @@index([user_id, archived, status])
@@ -427,6 +429,20 @@ model Idea {
   @@map("ideas")
 }
 
+model IdeaProduct {
+  id         String   @id @default(cuid())
+  idea_id    String
+  product_id String
+  created_at DateTime @default(now())
+
+  idea       Idea     @relation(fields: [idea_id], references: [id], onDelete: Cascade)
+  product    Product  @relation(fields: [product_id], references: [id], onDelete: Cascade)
+
+  @@unique([idea_id, product_id])
+  @@index([product_id])
+  @@map("idea_products")
+}
+
 model IdeaLog {
   id         String      @id @default(cuid())
   idea       Idea        @relation(fields: [idea_id], references: [id], onDelete: Cascade)