Not only that by Mrs. Cat drawing up the agreement and signing it he knows he's not risking anything. He has her hooked while he can use his own logic to validate wherever he wants to be. For example, oral S isn't real sex.... or, but we're just friends.... or, while as long as we are not living together (him and OW) we don't have a serious relationship so I'm not cheating. People who want to do something will figure out a way to validate it in spite of some agreement you try to foist on them.
ACJ is absolutely right. It would only "hold water" if it was Mr. Cat's idea and he drew it up.
There is no arriving, ever. It is all a continual becoming.
