The only thing I can think of is talking to Julia alone about Nick at breakfast, dinner or outside. There is also an event about Julia buying a treadmill for Kate in the basement, I don't know when that happens or if it is even realated to the Nick events. Other then that try having Nick and Julia walk in on you in the bath some more times, spy on them in the bedrom or continue other events, like the main story and what not.yeah no i dont know how to go feathrer