It's not like they'd remember it even if you got caught. Or, more seriously, what sort of obligation do you have to a spouse that's so far gone they don't even remember who you are anymore? In other words, was it evil of Michael Schiavo to be living with his girlfriend for years while his wife, Terri Schiavo, was brain-dead, but physically alive, in the hospital? Pat Robertson, of all people, gave an interesting answer to that question. Pat Robertson on divorcing a spouse with Alzheimer's. In this case, Robertson is against adultery (hence the divorce), but does seem to understand what a person goes through when their spouse is mentally gone, but still physically alive. If you ever get the chance, which probably isn't likely given the fate of many independent short films, watch "Comfortable Distance". It's about an elderly, but healthy, woman who's caring for a husband that's dying or incapacitated (they're not very specific as to what his problem is) who has a single, healthy, elderly man start hitting on her. She rejects his advances, since she's a married woman, but then they show her returning to care for her husband, who is virtually a vegetable. Boomer Tibbs does an incredible job portraying the husband. You really feel like taking care of this guy would be a living hell. He's just a disgusting, drooling basket case that makes you feel like you'd toss this guy in the dumpster and be done with him before you'd spend even a day taking care of him. And, almost predictably, the scene after her taking care of the husband is her deciding she wants to accept the advances of the guy that's been hitting on her. I think it would be an incredibly hard situation. I divorced an alcoholic wife that gave me more than enough reasons to leave her and I still felt like I was taking the last lifeboat off a sinking ship and telling her she'd just have to swim for it - and knowing she'd never make it. I don't know how I'd deal with a spouse that was incapacitated through no fault of their own. And I wonder if my mother will wind up in that situation as my dad slowly fades further and further away because of his Parkinson's disease. She keeps having to give up more and more activities because she's simply afraid to leave him alone for extended periods of time. It's times like these that having all of us kids scattered across the world and not a single one living even in the same state bothers me.