The cat will probably die today and my sister has Covid

Clarissa stopped eating Saturday night. She's had days where she refused to eat already, and we waited through Sunday, but now it's Monday morning and she's still neither eating nor moving around much. We think this might be it. Mom's going to call the local vet when they open; the mobile one lost her trust back during the first scare she gave us. I really thought she'd at least last the year out.
As if that wasn't bad enough, we got the news this morning that three weeks after they forced my sister to start coming into an office, which was never necessary in her line of work, she now has Covid. Four years everyone in my family managed to avoid it, but the world wouldn't let us escape it forever. So far it doesn't look like she'll need a hospital, and her cancer surviving husband hasn't shown any symptoms, but it's too early on to tell anything.