I fail to see why you should sign anything. If you want to divorce him, go ahead. If he wants to divorce you, let him. The laws of most states are pretty clear on division of property, child and spousal support. And since most states are no fault, then there's no reason to go into that either. You'll get half of everything, including the value of his business plus child and spousal support. Maybe more if he is wealthy. Just say no.