My step daughter (18) moved out permanently a year ago to live with her biological mother's grandparents. Although I have been her mother since a young child, the relationship has always been difficult and escalated as SD became a teenager. I imagine she has many mixed up feeling concerning her mother who died when she still a baby, but I feel this has been exagerated by the grandparents (terrible situation for them, I know) The thing is, my husband and I are trying to leave the door open and maintain communication, but she is still misbehaving, rude and downright disrespectful. My two sons are now 10 & 12 and very impressionable. I am really worried about her influence over them and she tries to get them on her own and regularly whispers to my older son???? Although I am keen for them to have a relationship I cant help feeling very protective over them. We recently met for a family dinner out with all my husband's family. My older son was a bit grumpier than usual, but SD came to him , overly close I thought, stoking his face and whispering to him in a strange manner. I stuck it for about about 5 minutes and then quietly said "No silly talk please" She was seething! And left the restaurant with her boyfriend in a flurry. My days are limited when I have visibility of the relationship between them, but I feel she still tells lies and plays mind games - an influence I am very wary off!! Should I allow her behaviour around my sons instead of making the situation worse between her and I?