I can see that it might not be possible to give full details - but unfortunately that does mean that the request "what to do?" can only result in inappropriate answers, as the full facts are not available.
What does come across is that you do not like this DIL, which is why the "least said, soonest mended" advice is particularly relevant.
Scam Calls Everyday For About 2 Months
Daniel “Tommo” Thomas charged, no bail.


without knowing the full background and facts no-one could be expected to give a helpful answer.

