Husband obsessively looks up

The same woman a few times a day, multiple times a week on FB. I don’t see a convo between them that is recent but he added her on SC (she removed him there) but they are friends on FB (he doesn’t know know her) and he’s stalked her OF. She’s local and has posted in mom groups I’m in..

I feel gross & uncomfortable about it & I don’t know how to feel. I already don’t feel good or pretty enough after just having our newborn. Should I add her & befriend her as a mom? Like idk what to do & talking about it gets me nowhere with him. It’s almost always like I’m somehow in the wrong.