(Add on to previous post)
My best friend recently passed away. I promised to take care of her daughter like she was my own, her daughter was willed to me and my husband. She's 14 and has become a little hard to handle. I am going on Thursday to talk to her therapist (who deals with grief and body image) but wanted to get any other ideas first.

Today was very bad. I left to go to the dry cleaners, grocery store and a few other errands. I suggested to her to come with me but she said she didn't feel well. When I got home I went to tell her I was home, and I picked up lunch on the way home. A few days prior I found her with her boyfriend in a bra and underwear and told her if I saw it again she was grounded. Sure enough, I found her with him only this time she had no bra on. He immediately left when I saw him and she was just sitting there. I said "I am sorry but you are grounded from him for 2 weeks. I told you before that it is inappropriate for you to be naked with him." She got mad but I know that if I do not stay strict with her or she will not learn. Did I handle this situation correctly?