do you mums think it is wrong that my ds of 16, 17 in april is having sex with his 15 yr old girlfriend? Know she is underage, but guess it doesnt matter what i say if theyre going to do it they will. she is on the pill and he is using comdoms. feel he could have waited another year especially as she is only 15, but her mum is all ok it seems bout it. she picks her dd up from our house at least three times a week. cant always stay in to make sure their feet are on the floor.