Yes bizzare I know, you couldn't write this stuff, I knew DS and girlfriend had pjs on, in living room with 14 yo DS waiting for Derren Brown to start, that is all ok, I went in to living room cos there was some yipping, and lo and behold girlfriend and DS are tickling and wrestling, now I didn't say anything but told 14yo DS I needed a hand with something, he was uncomfortable and needed extracting, how do I without offending tell them to cool it. My 17 yo DD has her boyfriend over but they don't do the displays, and it's pissing her off that I have'nt said anything. I'm stuck in dining room cos I don't want to see it. I get your having sex just not so obvious.