DD is 14 and a homebird. She also has near-supersonic hearing, and usually goes to bed at the same time as me and DH. The walls are thin enough that we can hold conversations with each other from each other's rooms. We deal with it by DTD as quietly as possible. DH and me are huge fans of loud, active sex but that isn't going to happen while DD is at home, and hasn't happened for a long time. I know I should probably be grateful to be having any sex at all. I am, but I'd like to be able to really let loose for once. I want to have a proper, noisy shag with us making as much noise as we feel making, without worrying about traumatising DD or being slapped with noise abatement orders by the neighbours. 
WIBU to leave DD at home for one night so we could sneak off to a cheap hotel? She hasn't been on her own overnight before. It would be a Friday or Saturday in case anyone is wondering. Alternatively if anyone has any suggestions about getting away with loud DTDing when you have older kids at home, I would welcome them.