I think it makes sense in a way that her personality went 180. Think about it, she was forced to be and dress a specific way by a scumbag who treated her as an object, and who tortured her mom. Now that she's free of him, she wants to rebel against what she was forced to be. She's redefining herself. They probably shouldn't let her wear that, but I doubt the mom knows much about human culture lol
Honestly, it makes less sense to me that she's so mature and knows so much, being that she literally lived in a basement
Also, yes there is a very pedo comment right below. May be best to ignore it...