Bridal Shower (but a bad one)

Me and my fiancé’s wedding date is 2-21-21 and yesterday (2-6-21) my dad and step mom threw us a bridal shower. A few days ago my grandmother got sick and she’s the type to fight through the sickness so she can get back to work. Last Friday (2-5-21) she was rushed to the hospital in an ambulance (getting this information from my father) and was diagnosed with “pneumonia”. Me and my fathers narcissistic family aren’t really fond of each other and they only do things for me to make themselves look good. I tried cancelling the shower a couples weeks ago due to covid (and with me and my fiancé TTC, we’re trying to be very cautious with covid, Not that we weren’t before, we are just taking extra precautions) anyways, we show up to the shower and they had apparently invited over 40 people (thankfully not that many showed up), but only about 20 came. We are keeping our wedding small so I didn’t want to invite anyone to the shower that wasn’t invited to the wedding because it would be rude to accept the gifts. During the shower I get a text from my grandmother stating that she has covid NOT PNEUMONIA. I looked dead at my dad and asked him what the heck is she talking about. He pulls me aside and says “you can’t tell anyone or they will all leave”. I couldn’t believe it. They literally lied to me, my little sister, her friend, and my fiancé. Keep in mind that my father and stepmom drove her home from the hospital after she was diagnosed with covid. Before I knew she had it they were hugging me, basically making us take off our masks to take pictures, and “joking” around saying “you don’t need a mask take it off”. I’m outraged. Me and my fiancé just got tested for covid last Friday (they were both negative) and Were probably going to have to end up taking it again (we aren’t fond of the feeling lol). I honestly don’t know what to do, and I constantly feel guilty (that’s how they make everyone feel) and if we get sick they’ll probably say it’s our fault. Should I still invite them to the wedding? I mean, it is my father, but he’s done pinched my nerve for the last time.