SOS can't poop around my boyfriend

It's silly both the topic and the way Im thinking of it but I can't poop when my boyfriend is around the house and now we are going to stay at his parent's house to Europe to meet them at the first time for 5 days!!! And his band (5 more men) also will stay in other rooms but in the same house!!!(They ll perform there) How to show all of them my human nature side?!? 😕 what to do, use public places?