Gatsby, I always love reading your thread because you remind me so much of myself. Which is mostly a good thing, IMHO! I was a good detacher, good at going NC, and my husband had doubts too (took them right back though). I'm too independent too, according to H, and I told him when he was moving out that he'd come to value that trait in his ex-wife. You're lucky not to have an OW, I'm ready for divorce due to my H's but am trying to hold off for my son. There really is only so much someone can take, and I'm past my limit but having a child does make you do things differently.
My H burned me to his family too (had to explain his affair and putting me through so much leading up to the discovery) and it would have been hard to be much closer to them. He told me the other day they have every reason to think I'm a bitch, but don't, like they're doing me a favor. And his mother asked him why things aren't better between she and I? My H should have been a political spinner, I've discovered. Smooth talker doesn't quite cover it! Your ILs sound really understanding compared to mine, so I'm a little jealous. The other posters are right, they know he doesn't have an excuse that comes anywhere near to explaining his behavior.
I can tell you already know this, but you're going to do well no matter what. And so will your baby, I'm about as anti-broken home for kids as they come but if you and your H don't get back together I almost think it's better for a child to not be put through the trauma of their parents splitting up when they can remember it. Never good, though, but there's only so much one person can do to avoid it.
Good luck, I can't imagine going through this while pregnant and it makes me sad to see how many are on here in that situation.
M: 35 H: 34 S: 8 Married: 12 years Together: 16 years Bomb: 11/2/09 Sep: 1/1/10 EA confirmed: 11/2/09 PA confirmed: 3/28/10