I met W to p/u kids so she could go to an IC appt. During the brief Exchange W told me that my Dad has been "digging her" in front of other family members / friends. My SIL evidently had to stand up for W. I did NOT know this. He does not know anything about the actual OM. W said we are going to talk about my Dad later on. I could see the hurt (sadness / anger) in her eyes. I obviously wouldn't / don't condone this by my Dad.
HELP on how to have this convo? Just listen / validate. Don't defend him / justify that her actions caused so much pain?