We recently moved from a three storey house to a two storey and since then our sex life has gone downhill dramatically. Our bedroom used to be en suite and on the top floor, with DCs on second floor. DD, who is 8, sleepwalks and also goes to the toilet around twice per night and has to pass our room to get there. We have to sleep with the door to our bedroom open because DP is on call, the door is noisy, and our three year old with additional needs would scream the house down if she found herself shut off. DD (8) is adjacent to our room and so could hear us/be in our room in seconds. Her room is also at the top of the stairs so she could be downstairs in seconds too. DP thinks possibly hearing your parents having sex is a 'normal thing we all remember' 
I can't relax and put it out of my mind but can't see a solution. Aibu?