type Link {
  id: ID!
  createdAt: DateTime!
  description: String!
  url: String!
  postedBy: User
  votes: [Vote!]!
}

type Image {
  id: ID!
  createdAt: DateTime!
  description: String!
  postedBy: User
  votes: [VoteImage!]!
}

type VoteImage {
  id: ID!
  image: Image!
  user: User!
}

type Vote {
  id: ID!
  link: Link!
  user: User!
}

got this

Your

Link

has a two way relation with

Vote

, and so do

Image

and

VoteImage

, but they are completed decoupled.