I know you are non-confrontational with him about the affair, but he has made a big mistake here. He should not be flaunting an affair in front of the children. He brought the bag into a child's room and left it open with the card visible. Does he think she cannot read? Why bother pretending he is visiting a "friend" when she can read the card and see that it is not a male friend but a woman in love? He should not be bringing his affair into your home.
