My FIL has been with a woman for we think 7 years now and my inlaws divorce was final just think past May. Six years ago he came home and told my MIL that he had bought another house and he wanted a divorce this because this woman was going to move to be with him. About 3 months later he SUDDENLY decided that no, he didn't want a divorce after all and begged my MIL to take him back. He broke up with Other Woman for a short amount of time but soon went back to his old ways. He finally told MIL again last year on Father's Day that he wanted a divorce, again. And then AGAIN tried to beg her to take him back. Thank God by that point she was finally done with his crap. We know he's been with this same woman the whole time and at one point was with my MIL, Other Woman, AND another woman, that we know of. He has cheated on my MIL their entire marriage and she kept turning a blind eye "for the kids". Some people will never change. We are sure that he's cheating on Other Woman because last year we were on vacation with him and we saw him in action flirting with a woman right in front of our face while we were all sitting there (me, husband, BIL, and BIL's girlfriend). After we were done with that situation we just all looked at each other and said "Did that really just happen???"
Anyway, my point. Some men are cheating jackholes and some women will put up with anything, and some women just have no self respect.
FIL is VERY well off though, I don't think he would get nearly as much attention if he wasn't.
Oh and Other Woman has known the whole time he was married and SHE was also married. Ugh. My husband is coming home next month and I guess FIL has hinted that he wants us to finally meet her. Yay, I just can't wait, I'm sure we'll end up being BFF's. <shudders and rolls eyes>