Here is my GUESS as to what happened with this relationship:
1. Sex life was OK. Not great, but adequate.
2. She gets pregnant, has kid.
3. She is not in the mood to have sex initially cuz that is somewhat natural
4. LSU is EXTREMELY patient about this.
5. She sees it as a comment on his feelings of attraction for her diminishing
6. Some tool at work starts paying attention to her when she loses the birth weight
7. She is having an affair
8. He is clueless
Recommendation:
Call this guy