The Biology of Music - I fucked my trans substitute teacher

When it is wet, I try to get my tongue in there, and then I add a finger. She moans when i put my index finger in and I stop, afraid that I hurt her.
"Are you ok?" I ask, afraid that it is about to end.
"Yes, keep going you're amazing", is the reply

I insert a finger while licking, and then another finger and then another. I have my three fingers in and her moans have become quite loud. All of a sudden she stops, turns over and says "If you don't fuck me now, I'm going to have to fuck you." I am afraid of being fucked, for many reasons, even though right now it sounds like exactly what I should do.

"OK I'll fuck you" I reply

She sits onto the piano again and kicks her tights off the rest of the way, and takes her hair down. She is so sexy with her hair down, and really looks like a woman now rather than a teacher. It’s less intimidating, and I relax a little bit. I take off my clothes and stand in front of her naked, feeling a little odd. I’m naked in school in front of a teacher. I start to remove her shirt, and she helps. She has to take off her own bra because I’m not able to release the clasp and then covers her small boobs with her hands. They are just about a handful.

“Why are you covering them”, I ask. I am desperate to get to them.
“I need to get implants”, she replies and she is nervous now for a change
“Let me see them. They look amazing”.

She takes down her hands and reveals her breasts. They are perky little breasts with nice pointy nipples and brown areolas, I make my way towards her, kissing her briefly and then kissing her neck and putting her nipples into my mouth, sucking on them and rubbing them, while my hand moves onto her cock again briefly. She sits onto the piano with her feet on the piano stool and I stand between her legs, my cock ready to enter her asshole which is just perched over the piano ledge

“Put it in me. I need it. I’m begging you”

I spit on my cock. And spit on my hand and push my fingers into her asshole again. I have never had sex before, never mind anal sex, and here I go with a trans girl. My foreskin is back and i push my cock head against her asshole. It feels amazing. It is very wet from my licking it and is ready for my cock. She is moaning and I start to insert it. I withdraw a little bit and then insert further. I start to get close to cumming already. I pull out completely.