I have name changed for this after years of single name posting. DS has a girlfriend whom we haven’t met yet. He is very keen to have her over while DH and I are out for a meal late night cinema . They may or may not have sex. I’m aware they are below age of consent. We don’t want to stick our neck in the sand ( DH is going to have the talk about contraception) but I’m also worried it could look like we’re facilitating him breaking the law, on top of concerns about emotional maturity. ( his and hers) . He seems completely distracted by this romance, is quite secretive and whatever we say seems to have little impact right now.