This is my last comment in this thread and I am seriously thinking about it being my last comment on adultery in general:
If it had just been MY ass, JUST me who would have been placed in financial jeopardy, I would have walked out on him in a minute.
It wasn't. I had a kid and my mother's finances were tied up with mine and my husband. I've known women who left and left their kids with the spouse and there was no fucking way I could do that and I couldn't screw my mom financially.
You have more freedom when you don't have people relying on you because their finances are tied up with yours and it's real easy when kids are something you can just walk away from. I had to be able to support my kid, I had to know my mom wasn't going to lose her investment (our house). My husband was a selfish, manipulative nut job who didn't care about anything but his wants, and he didn't care what the quality of our marriage was as long as he kept ME.
Life's real easy when you don't have any fucking responsibilities and the only one who has to face the consequence of your actions is YOU.