So she was just staying there, in front of a couple's bedroom, listenning? What a boor! When do you do that when you have a semblance of good manners? And why doubt a couple so much... She should know that her ex isn't very talkative. Plus, it isn't rare to find a lack of communication in a couple, that's really not something that can make it "fake" nor "suspicious". Besides, since when do all couples work the same way? And since when, because you are his ex, do you have the right to judge and weaken his life as a couple and make his wife insecure? You have NO RIGHT, either to say that what is happening between them is "strange", or to interfere in their lives in this way. Stick to do business and let people love each other the way they want without subjecting them to your rubric of what a couple should supposedly be like.