Try to show complicity, say something along the lines of "people have names"
Teenagers may not even realise this is problematic/abusive!
I would separate the couple to have a one-on-one with girl and tell her that she doesn't need to take his shit and create a space where the victim can speak up.
I would discuss it with a closer friend/ leader/ trusted person but to try and better take action to resolve the situation.
I would call the perpetrator “baby” to let them know how it feels.
If we say something along the lines of "should we talk about it?" may not be an appropriate intervention, we need to remember that with partner violence, they are going home afterwards. Intervening can also create escalation.
