My DS is 22 - he's just announced that he's got himself a girlfriend and I'm thrilled for him. I'm very close to him, he still lives at home, he tells me she's lovely although I haven't met her yet. I may be overthinking but I don't want to be one of the classic awful MIL's that people talk about on Mumsnet - even though that might never happen and I'm probably way overthinking! I just want to start this adult relationship thing right and have a good relationship with anyone he brings home. Please give my some tips so I don't embarrass him or do anything inappropriate.