I mean here's another scenario for you.
Girl grows up in bad home, dad never works, dad treats mum like shit, dad never really parents, mum ndn dad don't really value education so they let girl miss loads of school, all the lads in the area do drugs smoke weed, all the girls get drunk in the park, the lads generally coerce the girls into sexual acts in the park.
When girl is 17 she gets a job in the local shop and meets a lad, Matt, Matts is training to be a plumber, he's smart, not like the local lads, he asks her out, takes her out, buys her gifts. Matt starts telling her she should cut her friends loose, they're all slags, he's got a point, right? Matt doesn't like her talking to any of the lads from the area, well they're all dicks anyway, right?
Matt suggests girl move in with him, well it he's got a nice flat, better than living with her horrible dad.
It's great living with Matt, a quiet life, he cooks proper meals, likes to keep the flat clean.
One night she's meeting up with an old friend, Matt doesn't want her to go out in that short dress so he grabs her arm, hard enough to leave a bruise. He's really sorry though, it's only because he cares, no one else has ever cared...