My husband has contact with his ex-wife's family. What should I do?

There is a limit to everything. You should make sure that your husband only touches the child's menstruation and passes on the child's illness to the child's mother. If so, it should be understandable. But there is nothing wrong with talking about it, such as once a month, or once every half a month. You said "although not often", it seems that he has a good grasp of "degree".

You hate this because your subconscious is afraid that your home will be destroyed by your ex-wife, which is a sign of not trusting your husband enough. The result of this mentality is even worse for this family, so I suggest: don't dig deep into the dead end, trust him fully, and the result will be better.

Talk to your husband once and encourage him to send the child's information directly to the mother. For you, the effect will be ideal. Give it a try!