We have a 15 son who is deeply, madly in love with a 14 girl. We aren't thrilled about the relationship, but have come to realize that we are fighting a losing battle in regards to micromanaging it. They talk marriage. He doesn't know it, but I have overheard him frequently talk about sexual situations with her. They have limited time together, but their phone conversations are an ongoing concern to me. Cannot imagine the nature of their texting conversations.... Any advice?