I am answering because this was an A2A, but what Donald Tepper has said is all that I could have said. Check the local law regarding disclosure. Contract law is just that and is almost universal, but disclosure, unless legislated into your local contract requirements, has nothing to do with contract law.On a personal level, I cannot see how the failure of a selleru2019s agent, which ALL real estate agents were in the not too distant past, to disclose that relationship would have any bearing on a transaction. The contract rules and it doesnu2019t matter who represents whom when you have a willing seller and a willing buyer.