I told my my mom she could no longer stay with me for my baby shower and now I feel guilty.

I don?t know if pregnancy hormones are causing me to be unreasonable and emotional, but I?m beyond hurt and I?m not sure if I did the right thing.
My mother (51) asked to stay with me (f29) and my husband (m29) the weekend of my baby shower. We have been very careful about COVID considering I?m pregnant, but we said yes because we haven?t seen her in a year and she hasn?t seen me pregnant; I am currently 30 weeks along with my first.
A little backstory, my mom and I have always had a very rocky relationship. She was verbally and emotionally abusive growing up. I have seen a therapist and have been working slowly towards building a relationship with her. It?s been a wild ride, but I want things to be ?normal? between us and I know she does too. My brother has chosen to be ?no-contact? with her; I?ve been trying to make things work because I only have one mom, and she has shown effort to change.
A month ago, I told her that me and my husband are going on a mini ?baby moon? before the shower. We are staying in a private house with a private beach about 3 hours from our house. No one is around and we are staying at the house to not expose ourselves to others. She said she took off that week before to spend time with us, which was news to me, but said ?okay.? I did not know she wanted to be together the week before the shower. We agreed to spend the time we will have setting up the nursery and enjoying the shower.
The shower is taking place outside, with 15 people and masks are required. Food will be served in to-go boxes to avoid the spreading of germs.
Three days ago, I noticed that a mutual friend of me and my mom?s tagged her in some photos. Through this, I discovered that my mother is currently on a vacation with her ex husband and 18 other people at Myrtle Beach. According to the pictures, they are not practicing social distancing and are partying throughout the town. Myrtle Beach has one of the highest rates of COVID in America right now. She plans on coming straight to my house after spending the week there.
After discovering this I don?t feel comfortable with her staying in our home. I absolutely still want her at the shower. But I feel so ****ing hurt and betrayed that she would 1) go there without even thinking about the fact that she is about to come straight here when I?m in the 3rd trimester and 2) didn?t tell me about it.
I was dreading calling her and telling her. But I did, and offered to pay for half of the hotel to help ease the last-minute burden of finding a place. I stuck to the facts and didn?t get into how much I was hurt and upset. I just said that I didn?t feel comfortable with the high rates of COVID in Myrtle Beach and I?m very very sorry but it?s just not safe. I was crying most of the time. She tried to engage in a bit of conflict, but I?m used to it and dismissed/ignored it. She said: 1) ?I got tested before I came to the beach, I passed? 2) ?I only came here because I took off work and you chose to go on your own vacation instead? 3) ?Do you even want me at the shower??
The whole conversation was 3 min and 55 seconds and it just sucked. All around it sucked. I told her getting tested before doesn?t mean much if she?s there after the test and ignored the statement about her taking off. I insisted I wanted her at the shower and told her it?s the staying in close quarters at home that makes me nervous. It ended very bluntly with her very upset and that?s it. We haven?t spoken since.
Was I out of line/unreasonable? What can I do to make this less awkward for the shower? What can I do to make this better or at least okay?
tldr: I told my mom she couldn?t stay with me for my baby shower after finding out she is spending the week in Myrtle Beach not practicing social distancing. I don?t know if I was out of line or should stay firm in my decision.


Source.