Hello. I tend to agree with your sister, but do have a couple questions. Which child is our daughter, the 12 or 14 year old? Are you the child's mother or father? Why do you think she wants t sleep with you?
It is definitely time she start sleeping by herself then. You need to simply draw the line, I know that is hard but absolutely necessary. You are opening yourself up to tremendous suspicion. She is hitting puberty and needs her privacy. Just explain to her that she is older now and it is time. Do not take no for an answer. I know that is pretty direct, but this is a serious matter, Does that make sense to you?
I understand that, but you must understand her body is changing and with that her thoughts. I honestly believe this is totally innocent, but your sister seems to be looking out for yours and your daughters best interest. It is time she learn to sleep I her own bed.