Long story short, my parents are extremely anti covid vaxx (due to there not being enough long term data on the safety of the mRNA shots) so they spent the last year trying to convince me not to get it. My dad went as far as to say he will end his life or kick me out if I get the vaccine. I agreed because I was afraid of causing any division in my family, but not because I had the same opinion as them. So I continued masking and avoiding crowded places while my brother partied at bars with his friends. He inevitably ended up catching covid and spreading it to the rest of the family. While they have all thankfully recovered, they still can't taste or smell very well.
During this timeframe, I escaped to my boyfriend's place to avoid getting exposed to covid. I also took the opportunity to get my first covid vaccine while being away from my parents. Now that they want me to move back home, I'm terrified of what they might to if they found out I got the vaccine. After telling my sister about my secret, I feel extremely guilty for it and regret my decision. Am I in the wrong for doing what I did and should I tell my parents?
You're in a difficult situation. I don't think you're an asshole or a coward for doing it. You're an healthy adult who is able to make your own decisions. Your parents are not responsible for your body, you are.
I know that they love you and they want the best for you but you're free to make your own choices. I guess the only way they can find out is if your sister tells them or if you accidentally tell them. Otherwise I don't see how they could learn that you got your shot.
I totally understand why you're afraid of telling them, your dad has a very strong opinion on vaccines, so if I were you, I would be afraid too.
You shouldn't feel guilty, you just did what you thought was the best for your health and I see nothing wrong with your decision. I think you shouldn't tell them.
My sister is the opposite, she doesn't want to get the vaccine since she's afraid of her body reaction and also because there's not enough information about them. I'm going out with her and we're going to pretend that she was vaccinated. So I guess you're not the only one in this situation.
Hope it all works for the best.