Am I in the wrong???

At my job we are in a group chat, the owner asked if anybody can work last night and this girl who has COVID that tested positive Wednesday said she would, I told the owner I refuse to work with her because I messaged her the day before she told me she does have COVID , me and her are supposed to work together today but I plan on walking out I'f she comes i had COVID before and I ended up in the ER I don't won't to go through that again and I'm a mom of 2 under 2 , the owner is letting her work but making her where a mask am I overreacting????

Update so I left work and my boss and owner was extremely pissed so I'm probably going to loose my job bc it is hard finding one bc I have felony and a single mom , the girl came in and turns out the guy I was working with has the flu and there making him work with a 102. Fever