Same Family. Same Secret

So what are the crazy odds of two kids growing up in the same family and both ending up to be trans?
I probably need to give you a little more to the story before you answer that question . So I’ll try to keep it as simple as I can. My stepdad’s brothers son has transitioned MTF . Yes I guess I could’ve just said my step cousin, but I figured I’d give you a little more context than that.
My mom and stepdad got married when I was pretty young, young enough I don’t have a lot of memories without my stepdad and his family. Growing up his family didn’t live very close to us. They were about a 6 Hour drive a way so we didn’t see his family a whole lot but holidays, summertime and random trips throughout the year we would go visit. My cousin and I were never close. I was always a lot closer to his brother that was a few years younger than us than I was with them. We didn’t have a lot in common. He liked to read and he was into things like Pokeman and Dungeons & Dragons and I was always more into sports and drinking you know the jock type. I couldn’t even tell you the last time we spoke probably been 20+ years. He got married and they had a couple kids.Him and his wife where a lot different from the rest of the family, I was always told she didn’t like any of us, so we were never around each other. Thinking back on it I don’t think I’ve ever met his ex-wife or his kids. And then one day some of my stepdad‘s family were over at their house, and my cousin got brought up , his mom said that he had gotten divorced, and he was now dating a transgender person. So naturally, I started paying closer attention to the conversation and to be honest my family was completely ignorant about the topic and I didn’t have the courage to speak up and educate anyone on it. But they said he was dating somebody that was a boy and was transitioning into a girl, and they were question if he was doing the same because some of the pictures he had posted on Facebook. I wanted to reach out to him to have a conversation with him, but I did not have the courage to out myself. Plus, I thought it’d be a little weird since we had to talk in so many years.
Fast forward a few years later the last I knew was he transitioned and I’m guessing she’s changed her name because I can’t find her on Facebook. I’m still not out to any of that side of my family and my stepdad has passed away so I don’t know how to bring the conversation up with any of them so that I can get in touch with her. But I’ve been thinking about it a lot lately. What are the odds that both of us would end up transitioning later in life.
I’ve always thought it was kind of weird. Makes me almost think that there’s so many more of us out there that will never know about because so many of us are scared to come out speaker story and live our authentic lives.