Prevention of exclusion of descendants through renunciation of inheritance/partition in a marriage contract
My wife and I entered into a notarial marriage contract at the beginning of our marriage in 1999, which includes, among other things, the following provision: "We mutually waive our rights of inheritance and compulsory portion and mutually accept this waiver." At the time of the contract, we were not aware that this would also exclude descendants. I have children and grandchildren from a previous marriage, whom my wife now wants to include in her will. She herself has no children of her own. Can my wife include my children or grandchildren in her will despite the above provision in our marriage contract, or do we need to amend our marriage contract accordingly? Is an amendment of the existing contract possible, or does it need to be revoked and a new one signed? What could the new text be, which only refers to our mutual waiver and excludes my descendants from the waiver?