She would probably not have the papers to deliver to him; a lawyer/mail/messenger, etc. would deliver them and/or he'd have to go somewhere and get them notarized as he signed them! No proof it's his signature with whatever she had him sign. Don't know what she was having him sign, probably something she was doing on her own, but the courts won't pay much attention to that.

http://www.raggiolaw.com/txart06.html

I would give your guy an ultimatum; get a lawyer/legal aid and sue for divorce (even if he gets nothing) and stay away from her, etc. until it's done. It doesn't sound like he or his wife have many marbles so I'd make it "simple" for him; have him get legal help and his own act together if he wants you; to heck with her and what she's doing.