Just caught up and now my day is ruined. I'm heartbroken for you.
Keep going to the gym and try to start detaching emotionally. If she feels that she's losing you (by you starting to live for yourself,) she might take notice and think a bit. She can't be warm toward you or sleep with you because she will feel like she's cheating on the OM. I know, it's just horrible.
No more enabling her running around. Time to say NO, you're not going to be stuck alone with the kids on so many nights.
