Help, I need advice. I have been married for 10 years and have 2 stepchildren (my husband's children from a previous marriage)and 1 child between us. My stepdaughter is 15 and my stepson is 19 and my daughter is 13. We have recently learned that my stepdaughter who is 15 is having sex on a pretty regular basis with her boyfriend. Both myself and my husband spoke with her upon discovering this and went through the whole respect yourself, use protection, etc. speach. Being a normal teenager she kind of just laughed it off and said she won't do it again.