We need far more context. They take it seriously or seem too, have you? Lots of posts on here about dps thinking it's all stuff and nonsense... Or thinking they are taking it seriously but not mitigating any risks.
Do you see anyone who maybe a risk?
Sounds odd if you normally get on.
Without a doubt I'd be seeing my dm and letting her stay!!
However we will be using covid as an excuse against in laws for as long as possible. Many many reasons but one that may be useful to you is that they only think of themselves and their own health.
Dd has asthma, we get flu jab to try and protect her but in laws, never crosses their mind to protect dd and say flu jabs are stuff and nonsense.
Fil has form for feeding dd from his utensils and even after and during bad colds ill etc even though we asked him not too.
They share ice creams even though they could easily buy 2. So we don't trust them. We don't feel they truly care for dd or think about wider risks etc.
It's very stressful when your worried, rightly or wrongly about something child related and people near you, belittle you.
Is it anything like that op?
I do feel for you it must be hard but there must be a reason.