An opportunity or a trap?

My little brother has a tomboy friend which he invites home now and then for some fun. She's only 11 but considering that she's a tomboy she's very violent and fiesty, but that's because her family is fucked up. Her mum's been divorced several times and afraid of divorcing again, her stepdad is a lunatic who beats her up when he's stressed, her real dad died from cancer, her stepbrother is a retard and dickhead. And she comes to us to break away from all that stuff. So I just wanna make her feel better and support her, however she does these really strange things.

For example, her telling me that she's seen her mum have sex (and her mum's a big person), shoving my crucifix down her pants/knickers/bloomers and anything else she could find, stripping down naked quickly to change into her pyjamas. One time after showing my little brother and her a horror movie she was so freaked out she dragged me into the toilet with her.

So opportunity or a trap?

Hey 4chan, sorry for the very very late reply. Lots have been happening so let's put it this way. Her parents have divorced so her mom's all depressed and upset, not mentioning that he took a good amount of her money from the bank. She's having a hard time coping so I suggested looking after her for a while, in case things were too much for her. Now the little girl, 12 now lives with me a couple days a week. Me trying to be a good guardian has told her to not do any of the previously mentioned things. I literally had to tell her precisely what she was doing wrong, and she cried about it.
It's hard for me to upset her (hey I'm a nice guy) so I told her we can do somethings on occasions.
Like when I do watch a good horror movie and she gets freaked out, I'll wait outside the toilet door. Sometimes, especially when the damn heating doesn't work, we sleep together.

So no kissing, no sex or whatever. I'm being as clean as I can and trying to help sort out her childhood problems. So a happy ending 4chan?