"You can argue and come up with stories about lovers in a window on your phone in the hallway, in the bathroom."
But I haven't, have I, so that's something you are making up. You have such an enormous need to be right that if there's no evidence of something being said, you will simply make it up. All I did was make the reasonable assumption that she had gone to a neighbour's apartment within the same building so stop your nonsense about lovers.
She was out of the apartment for 1.5 hours tonight in her bathrobe. She has NEVER done anything this before (not in the 6 months I have watched) Maybe she was making a call just outside the flat and did not visit another apartment but spent all that time outside rather than simply call from the bathroom? Why leave the flat? Unusual does not mean suspicious but it is worth commenting upon.