I don't know if all this has come about because of:

1. the OW (can't be sure if she's still on the scene though)

or

2. he is pathalogically, unconsciously being driven by his fear of becoming a father and having a family (no doubts about this).

or

3. He is grossly immature and doesn't want the responsbility required of parenthood -except for being Mr Bank! (probably this also)