I never signed a contract, lol, but I was clear with couples what my boundaries were as bull--primarily that I use condoms and the cuckold watched from somewhere off the bed or at a distance with his clothes on and no pics or video were allowed.
One major caution I have is that cucking is sometimes the husband's fantasy not the wife's. Before I learned to interview the ladies alone this led to some awkward hookups where wives were doing it for their hubbies and not for themselves. A few even bailed before our clothes came off.
If a woman says "I don't really want to do it but he does/it makes him happy/I want to make him happy/it's for him" then don't. She has to want it & choose it.
Talk with her in person apart from him to make sure she really wants to do it. Ask what her boundaries, limits and expectations are. Don't agree to anything you don't want to do be it S&M, water sports, anal, scat or whatever.
