AIBU telling sister to stay away from me and newborn

[HappyButHangry]

I'm a new mum (3weeks PP) and staying at my parents while our house is being renovated. Sadly my grandmother passed away last week and my mum is visiting her family still. My dad and brother both got covid when they attended the funeral and have both been staying upstairs since they tested positive so they don't pass it on to me.

We (DC, DH and myself) have an en suite room downstairs and haven't come into contact with my dad and brother. My mum asked my sister to come and stay to help so she has been making my dad and brother meals and taking it to their rooms. She is also staying in her old bedroom upstairs and in close contact with my dad and brother. I've asked her not to come in to the downstairs rooms we're using (the converted room we're staying in and another family room) as I'm breastfeeding and it will be hard for me if I get covid.

There's now been two situations where I've had to ask her (gently) to leave the room and each time she's stormed off. I tried phoning her to say it isn't personal and I'm just trying to be cautious. AIBU?

Also, I'm astonished at how entitled other people (so far my sister and an aunt) are - if a parent asked me something pertaining to their child and respecting a boundary I can't imagine getting uppity about it. Even if the request over the top, ultimately it is somebody else's child and who am I to override them!? I'm honestly surprised my sister hasn't been more understanding.

Sorry meant to add when I tried phoning her, she has been screening my calls.

Do what's right for you newborn. YANBU. Build bridges later if she's screening calls.

How many downstairs rooms are there and how many are you using? Why can't she go in "the other family room"?

She's put her life on hold to go and cater for the dad and brother, which presumably is quite a lot of work, with no help. She's risking getting Covid and she may be grieving for her grandmother. You can hardly blame her for being cranky.

Out of interest, what are you doing to help out while your sister does it all and has to sit on her own?

Did you miss the part where OP said she had a three week old baby? I’m guessing she might be a bit mentally and physically tied up.

I can assure you the entire downstairs looked a lot cleaner and tidier before she got here. Of the four days she's been here, I ordered three meals and two meals were sent over by an aunt. She hasn't actually been doing that much.

Kitchen with breakfast room, dining room, two living rooms and the room we're staying in

If I've read that right then and she would have a living room to herself (?) then YANBU. It would be unfair given she's helping out to be limited to her bedroom and kitchen but it sounds like she has quite a bit more room than that?

Some people don't get the risk to newborns and Covid. However it's her parents house and she is going to treat it as such. Is it your Aunt that's lost a parent? Is your sister upset about your Man dying? There's a lot going on in the family. If they've got the Omicron strain it only lasts about four days, so it'll be over soon. Hopefully the weather is ok were you are to open the windows.

Just for reference, my sister posted this in the extended family group chat after my dad and brother got covid from when they went to the funeral. (my aunt's husband knew he had covid and came to the funeral and wake etc)

"If someone is unwell, common courtesy and sensible practice is to stay in your home and not go around spreading it to other people 😤"
So she definitely understands what the risks are

Of course YANBU.

My baby caught Covid and was so miserable with a temperature and it took her about 2 weeks to stop being tetchy, she also had hives and weird immune responses for several weeks after. Your sister is pretty damn selfish for acting like she has a right to expose a newborn to that.