No. But you do need to tell your daughter to stop fooling around behind her husband's back, that you don't want her talking with you about it any more, and if she won't stop, she will have to find her own place to live. She is behaving badly and she expects you to be part of her conspiracy. If she refuses and continues to behave this way, ask her to get out. You may allow your S-I-L to remain in the house if you want.