Yeah, I hope class rep gets what's coming to her. Lying by omission is still lying to steal him away, although not hearing him out does hurt but it's understandable for her. I just hope this gets resolved and can go back to the typical format.
An even smarter move would've been cutting off his hands instead of going for the backstab. That way you get to watch him crashout over the loss of his powers and then see him squirm on the ground after he inevitably loses his balance
Not just that but I think this is also the first chapter where we've seen a depiction of one of the girls pregnant. It's been mentioned before but we've never actually seen it even though with all the times Sou has done it raw, it SHOULD'VE happened by now