My daughter wants her boyfriend to sleep over, should I let her?

Legally your daughter is allowed to be having sex at 16, what you need to decide is if you are happy for this to happen under your roof.  If you don’t allow it, will she just stay at her boyfriend’s?  How does this make you feel?  Have you had the discussion about safe sex?  Do you feel she is being sensible?  How long have you known the boyfriend? There are many factors to consider, only you can make that decision, you make the rules about what goes on in your house and you must do what you are comfortable with.  Don’t over-react as the most important thing is that your daughter feels she can talk to you.  Discuss your fears with her and perhaps make a family contract regarding what rules must be abided by.  You could try and write a list of pro and cons to get a clearer picture of how you feel about it.  If she wants any further information show her the RU thinking website and leave her alone with it for a while, it is an excellent website for teenagers about sexual relationships.