Is it normal my bfs ex gf has forcibly sucked me...

Well first off in am young transsexual. Male to female but still have my penis, i love it and want to keep it. It is also quite large and thick.
So My bf was so called friends with his ex gf. Found out he was still fucking her. But she met me and thru her texting me. She came to find out about me. Then he started asking to come over and suck it. And let me fuck her. She got to my house and instantly started to pull up my dress and my panties down. After she had sucked me hard i fucked her so hard. She then begged me to cum in her ass. I did and it was amazing. I want to date her now but she has a new bf. She always comes over and fucks and sucks me. I'm not a very sexual person bc of who I am. But she turns me on and always asks me to finish in her ass. I just find it all weird but love it!