Hi I am new to this site and hope I am doing this right....So here's the deal...I have been with my now fiance and his now 16 year old daughter for almost 8 years...he has full custody of his daughter and her mother rarely sees her at all ( once a month at best) me and his daughter are very very close...she is even the maid of honor in our upcoming wedding...she recently decided to share with me that she lost her virginity to her recent boyfriend who I have never met and her Dad only met once....also she lied to me and her dad and said her mom never met the boyfriend yet, which now she confessed that her mother has allowed him to her house multiple times. A few months ago the daughter was wanting to spend more time than usual at her moms house and now I find out its because her mother allowed the boyfriend over and this is where the daughter lost her virginity....at her mothers house!!!! The daughter is begging me to not tell her father and I'm so confused...I love the fact that we are so close and she can talk to me but my fiance needs to know that his ex wife is allowing their daughter to do things we would never allow her to do and her mother is keeping this all from us because the mother knows all of this....she just doesn't know that I also know now! What should I do????? Please help