In the past (almost) 2yrs I've been on this board, I don't think I've ever read of a LBS being chummy with the OW.

I would think this is dangerous territory.
1- As AS posted, your H will think you're giving him the green light on the emotional affair.
2- This has got to be your boundary.

You need to take care of yourself before you take care of your H.

M 42 H 39
T10 (-2yrs separation)
S8 D5
DD 7/30/11 (EA&PA)
Reconciled 6/2013
Separation in works 1/2017