Wow Deborah, that is a sad sad story! Did this woman intend on becoming a SAHM, or did it just happen? I ask because in addition to hearing people tell that one day I'll 'just want kids' I also hear that even once you have them, even if you didn't intent to stay at home, you'll wind up wanting to stay home. So this guy might not have wanted the SAH wife, but maybe having kids changed her personality so completely that she wasn't who he married anymore??
I think that for couples that don't have anything in common anymore except for kids, when the kids leave, the next thing on that couples' future is grandkids, hence some of the pressure on some of us to provide them.