I mean, that’s basically how it is everywhere, high schoolers bragging about their college bf/gf is a mark of pride culturally. The sentiment against it is extremely recent and honestly pretty small.
Except the abuse is not a CONSEQUENCE, it’s a cause of her behavior. It’s not like her stepdad went “wow this girl is a two faced bitch, I should molest her”. A consequence would be like, her getting called out and becoming a social outcast. Hell she didn’t even miss out on her birthday cake...
Except her arc is super flat, her behavior is the issue and she’s never had any consequences from it which is paramount for a good redemption arc. And no the thing with her stepdad is not a consequence, it’s a circumstance.