Is it normal to be sick of having to hear about relatives?

Unfortunately, my parents sometimes mention these relatives, even though they know I don't like them. Because it's Christmas it's especially bad. They are my aunt and cousins on my father's side. Every single person from my father's family has a selfish and narcissistic streak. My aunt and cousins always brag. Sometimes they go as far as telling lies just to make themselves look better. I know for a fact they don't care about me. Unfortunately that doesn't stop them from writing to me on Christmas and my birthday to brag about their oh so perfect lives.
An example of their lies is my cousin claiming that she bought her kitchen at an expensive store. By coincidence one day after she showed her kitchen to me, my SO, and my parents for the first time my SO looked at the IKEA website. There he saw the exact same kitchen my cousin has. So, she lied about where she bought her kitchen just to make herself and her family look better. The thing is I wouldn't have cared the least if she had said the truth, that she had bought it from IKEA. This same cousin has also told my parents I've never written her any emails which is absolutely not true. She's on her last chance right now. If she tells any more lies about me or does anything similar she'll be out of my life for good.
Both my cousins are always exceptionally nice to my parents when my parents visit. My SO and I know the reason why. It's because my parents invite them to a restaurant so that my father gets a chance to brag about the amount of money he earns. My parents never realise the true reason why my cousins are so nice to them.
My aunt is annoying in yet another way. She always pushes my father to help her with the children's musicals she is in charge of for her local church. Then my father always complains about how much time this takes. When I say that he can just refuse to help my aunt he doesn't care. My aunt also thinks she is the most important person in her local church community just because she is in charge of the children's choir. The reality is they won't let her do anything more important, like being in the church committee, because she had an affair on her husband, which everyone in the small conservative town where they live knows about.
I'm really sick of having to hear about these fake people who I don't have anything in common with. Luckily, at least I don't have to visit them anymore because now I live too far away from them for that. Is it normal to be sick of having to hear about your relatives?