You're dead right. If it ever does get to that point, I wouldn't cheat her, but neither would everything stay in 'both' our names. W would have to get a job. That would kill her. She's worked now and then at small jobs, but for fun, fill in boring days.
Her dad would help her, but he would never support her. He'd say 'get off your a$$ and take care of your self.' He's funny that way, like a bank. If you don't really need it, he can be generous, but if it's because you're not doing something for yourself, 'go to hell, get a job'.