Can you help me, please?

There's this girl who I have had a crush on and I've thought that she was a "bad girl" but I'm beginning to think she's not. We hung out the other day and she told me that she was really hurt. There is this little boy who she babysits she absolutely adores and idolizes. She was out at a restaurant with her girlfriends last weekend and she saw him & his parents. The thing is, she smokes cigarettes and had just smoked one with her friend when they came back in and saw him. He ran over and gave her a big hug and kiss and everything and she said when they got done talking she overheard him telling his parents that she smelled funny and they told him she was a smoker and to never pick up the habit. She was also wearing a shirt that showed off a little bit of her midriff and her hip tattoo was showing and she felt embarrassed that they saw it. She told me that she has cried about it because she feels so humiliated and such a bad person. She would NEVER smoke in front of him, and even though she enjoys it now with her friends, she is going to give it up before she becomes a mom herself. What do you think about her? What should I do?