Dryhumped A Female Friend When We Got High

So I recently went to a concert with a friend of mine. Usually we hang out in a group and she has a boyfriend that is 8n our group. But this time the rest of the crew got delayed so we went in by ourselves.
So we both got high and I ended up dropping her home and while she was trying to unlock her door I came up behind her and started grinding her ass I was so horny with alco and she had a nice butt.
She just stood still leaned forward with her 2 hands on her door and pushed her ass back and I slid my dick up and down on her asscrack till I came on the back of her skirt. She finished opening her door and went in after and ì left. The next time I saw her she acted normal like everything was ok. And she just keeps telling everyone what a great time she had her boyfriend even thanked me for keeping her safe.