@NizzBizz: Just fell in love with another man (the protagonist's father). Honestly they seem to be being way too harsh on her? (Like the protagonist as much as says, "it's a bit harsh," to the lady's husband? But only right after personally thought-shaming the lady in question...)
Especially, hot damn, all this for someone who lived through being the "side woman", for the better part of decade, of the person she's being called out on being "unfaithful" to. Jesus Christ! Double-standard much!
But anyway. Like, yeah, people's hearts waver? She seemed to be trying to cope with it appropriately, whether or not she was succeeding. If she wasn't managing that well, she might have needed an intervention, okay, but our protagonists seemed to be more interested in a beat-down. "Repent, ye slut!" ...It's kind of uncomfortable.