Right, and MY initial reaction to the BD was, "wah! wah! Please don't leave me. Let me try extra hard to romance you."

Basically more of the same behavior that drove her to the A in the first place.

M46 W48
M11 T14
S11 D8
BD: 2016/05/27
In-home separation: 2016/11/23
Nesting: 2017/06/11
W moves out: 2018/01/07
W goes public with OM: 2018/07/12
I ask for a divorce: 2018/12/14