I have a 13 year old step daughter who is more comfortable asking ME the questions instead of her mother. I usually answer her questions with, "Well, what do you THINK that means?" or "How do you THINK it happens?" ... then elaborate or offer correct information based on the response. My wife and I BOTH shoot straight, offer 100% accurate and truthful answers using the correct terminology while looking her straight in the eye. Help her understand this is serious to us, and we want to answer her questions honestly, because if WE don't... someone else WILL.