She's still going to be pretty angry and upset about it as they come back to school, mostly because she's forced to face both parties again.
Tabitha will be sitting near the front of her classes for sure so she doesn't have to look at him, Mina ;)
So far in my head, Dom is the kind of prefect who won't punish what he hasn't seen directly because that's not fair - but if Sy does something in public he'd probably say something because that's just stupid anyway. ;) he doesn't get right into every single fight but definitely operates under the "don't be a dick" rule...