- If the OM's sister enabled their affair in any way, or if for any other verified reason she is NOT supportive of your marriage, then you are not being unreasonable.
- Even if you CAN'T verify it, as Jack said, if YOU find their contact unpalatable -- if you can't feel safe in the relationship if your wife is in contact with this other family -- then you're STILL not being unreasonable, because, as Jack said, this is YOUR boundary.
