I don't happen to agree with a LBS trying to be the WASs "best friend" while the LBS is actively involved in an affair.
It's just asking a bit much.

That said, I do think a place of grace and tolerance can be reached within the LBS and they can show kindness without judgement. It's not going to come easy or naturally though.

To truly try to JUST be a "you can cry on my shoulder" kind of friend could be harmful to the LBS in my opinion. Especially in the early days/weeks/months after the discovery of the affair.

I just don't know anyone that is strong enough to withstand that kind of self-compromise.

I simply don't advocate it.

It is too potentially harmful to the already-wrecked LBS.

Maybe down the road.

Not right out of the gate, though.