Interesting advice from FY. I would say it's okay to ask if everything is ok, but if she doesn't open up, I would drop it.
Also, I would not ask her to not receive texts while she's at the house, bc what if it's not the OM? She would see this as controlling. It's a tough spot, Arsene. You are so strong to stay calm even if sometimes you say you behave coldly. It's so understandable!