It's the first time I've met him - she's "in lurve" and has very timidly asked if we can meet him. She's 17. He's then staying the night (in DS1's currently empty bed, because I chickened out of saying he could sleep in her room). It's going to be hideous - much younger DS2 and 3 will be there (DS2 asked earlier "Do you think they've actually kissed?" ), she will be embarrassed and hissing at me every time I make what she considers to be a social blunder, I'll be embarrassed on her behalf - what should/shouldn't I do? What was the most mortifying thing your parents ever did/said in front of a new boyfriend?