In law problems

Over the last year we have had a lot of issues with my husband's parents and family They usually don't ask to see my children since we started having problems because I cut off contact when she couldn't stop crossing boundaries, It then went to only asking for one of my daughters over night and not any other times and always without the parents so she was told no We eventually came to an agreement that they could collect on a Friday once a week for the one on one time with that child but be home for bedtime and respect the bed time However outside of this they do not ask to see us or our children anymore than that evening so they have no interest in seeing the parents or other child My child has now told me that he's been told not to tell us he's seeing other people in the family that have nothing to do with us on the Fridays that he goes I'm at a loss what to do, the last time we said no they tried to claim me and unfit parent because she thought her way and what she wants is the way to go and not how we parent What do I do?