To have said be needs to keep distance from younger sibling?

[GloriaBoil]

My step son (8) is staying home from school as their best friend in class has tested positive and DH and their Mum wanted to get him tested before sending him back to school. His lateral flow was negative but waiting on the PCR result because he said his head hurt, which he did this morning.

This has resulted in him staying with me all day as I'm at home with our young DD (2) and they are working.

I said to DH last night that I'd really prefer it if he could speak to DSS and just explain that whilst we wait for the result to come back I'd really prefer him not to be playing closely with DD, picking her up etc which he normally does and could DH just have a chat with him before he leaves for work.

DH thinks I'm being really unfair and unwelcoming and I can't segregate DSS in the house.

I've not suggested separating anyone, it's not like I'm saying he needs to stay shut in his room obviously! Just that he keeps a relative distance from DD, not in her face, playing with all her toys, hugging/picking her up etc.

AIBU!?

You are right

If the kids were not step siblings and full siblings It would be perfectly acceptable to be saying to the eldest "while we wait for your results stay away from the little one and the little ones things and we are going to try and not pass anything on" simple

YANBU, though IME with my 8yo DSS he just did not retain the message and continued to be in everyone's faces and very touchy feely.

But the biggest problem here is that your DH is highly defensive, accuses you of unreasonable things, and yet you are expected to do childcare. It's way out of order. I mean this nicely, but you should have some self respect and stop providing childcare for him, he does not deserve it with the attitude he has.