Strong EA after 2yrs M - trying to detach. #3

[Complex]

It's just a little thing but I really need advice on this bedroom thing bc W just came home ranting and blaming me for even going into the bedroom yesterday night. I basically woke her unintentionally and then told her that this is not what we agreed on. Then I let it go and slept in the guestroom.

She was on her way out the door very mad telling me she will let me know later what she thinks about it.
I stayed very calm and confident and friendly trying to not let this turn into a fight, did the right thing.

But here's the thing: She will be like "I'm paying this place mostly, I need my rest, you need to move to the guestroom".

What am I gonna tell her? I do NOT want to do her that favor! But I don't want to end up in a big fight.
I'm scared because if it starts like this now, what will she do to me during D negotiations...Jesus