Looking for story: transgender woman & former teacher

[mrmatt24]

Hey, I'm looking for a story I read a while ago where a guy is about to have sex with a woman when he finds out she has a dick. She reveals that she used to be one of his student when she was still a boy. The teacher doesn't want to sleep with her anymore, but she blackmails him into taking her dick up his ass.

If anyone knows where I can find this story please let me know. Thanks!

 

[JayZip]

The part about the trans girl hooking up with her former college professor sounds like "Orchid" by AwkwardMD:
https://www.literotica.com/s/orchid-ch-01-1
But not the blackmail parts. Orchid has D/s elements, but is relationship-focused, no blackmail.