Your wife sounds like she values family.

Interesting that she is leaving you for a man that cares about his children so much that he is going to leave them and be a weekend dad. And she accepts that because does she honestly want 4 kids 2 weeks a month?

Your wife keeps bringing up how much she misses the kids, wants the best for the kids, etc, because she is struggling with the fact that her own selfishness is going to break the family up and hurt them. Granted that voice is really quiet right now, and the devil on her shoulder is screaming at the top of his lungs.

Its really good you don't respond to her crazy comments defensively or with sarcasm, the quieter you are the sane voice in her head gets louder for you.