While I am not cuckold, I do like to share. Even did sharing this weekend in which I had sex with someone new, which actually started out fisting, before fucking while wife played with her room-mates.
Misterchill hasn't responded back about this contract - but also, nobody responded to him. Now how is it working out.
I've done similar contracts myself, but I also put in an OUT for all. But each their own of course, misterchill.
For others who are thinking of something similar - due a trial contract of 30 days.
Have a relationship clause, in other words - you can lose your wife. You may not get what you want and be held to an agreement which you made.
Have a communication rule. Which I have used to make sure all were on the same page. When that didn't work - I pointed out that the contract had been broken (by the wife) which can also severely damage the relationship.
So after I considered the contract VOID and told her such - she was in a shitty mood but agreed that she had not done what was agreed on. But we'll work together on another "trial" contract.
misterchill, I give you this... you have balls

And by all means, if you are both getting what you want - then I and others have nothing to judge against.