Ex has just walked into house, moaned at dust, and taken DS until New Year

[Anamechangeforthisone]

I don't know whether he is serious but feeling a bit shaky.

We split earlier in the year - he comes and sees DS when he likes. No real problem but he does spend time in the house.

Was meant to take DS out today, but found one thing after another to moan about. Then said I am incapable of looking after DS and house is filthy (it is not that bad) and got DS to pack a bag.

I said I would call the police but son quietly not to. He went very quiet.

Guess I will see whether he returns.

Left with the passing words - I have his passport

Having just read (some of) neighbouring warning of ease of spread of Covid,I think I'd be cautious of your DS's return "at New Year", particularly if father and son
were seen to leave by car without wearing face masks. In fact, I'd assume the child would be infected on his return, considering OP's comments on her husband's desire to upset her. Sorry .

Well he returned and then wanted to go back to ex's for the night

That’s progress, at least.

Can you try now to find out where ex is living? Did ex try to come inside or just drop him off?