Daddy’s Biology Lesson : Anal Incest 67

Daddy was giving me some home-tutoring in biology, and the part about the digestive system is really igniting my curiosities.

I ask about anal sex, and daddy’s embarrassment is endearing as he explains using diagrams exactly what happens.  Now it’s all I can think about, and next lesson I ask for a practical demonstration.

Read as he takes my anal virginity, sliding his length home with the help of some lube and talking me through exactly what’s happening!

Read An Excerpt

“Reach further,” I told him.

“Oh, you want it in your colon?” he asked.  “You’re going to need something longer for that.”

“Am I?” I asked, batting my lashes back at him.

“College was a bad influence on you.”

“Enjoy being the beneficiary.”

Daddy snapped his finger out of my ass and then brought it around to my mouth.  I glanced down at it and then raced my mouth over it.  When I did so I heard daddy’s heady sigh.

“As naughty as your mother,” he said, dragging the finger out of my mouth and moving it back to my ass.

This time he smudged it around the tight muscle and then I heard the clank of his belt.

“Are you going to fuck me?” I asked.

“I’m going to fuck your ass,” he said, looking up at the ceiling as the floorboards above creaked.  “And you’re going to be quiet.”

My veins fizzed with adrenaline at that moment.  It was so fucking naughty that I can’t even begin to describe everything that was going through my mind.  At that age, I just wanted to experience stuff, and daddy was offering my one of the most daring experiences I’ve ever heard of.”

“You’re just going to fuck my ass?” I asked.

“Consider it a practical lesson about the size of the female rectum,” he said.  “It’s big, remember?”

Suddenly I felt a dull press at my butt.  This was bigger than daddy’s finger and I had a hard time opening over him.

“Is that …?” I asked hopefully.

“That’s my erect penis,” said daddy in full biology-mode.  “And it’s trying to squeeze its way through your sphincter.”

“Try harder,” I grunted with gritted teeth.

I closed my eyes and pushed my ass back, feeling the muscle relent.  Gradually it widened as daddy entered me, and soon I was gripping around the bulbous crown of his cock.  It was unmistakable, even though I’d never felt it before.  That thick, hard cylinder sliding inside me like granite.

“Oh, daddy,” I hushed, reaching back to feel him.

I stroked at the pubic hair above his cock and then touched the base of his stiffness.  I trailed my finger over it and traced a line to my tight asshole that pinched around him.

“That’s it,” I whispered, with tears of joy welling in my eyes.

I reached lower and stroked the folds of my pussy, then I teased at my O and found it leaking out its juices.

“That’s it,” said daddy, leaning away and looking down.  It must have been some fucking sight to see his cock disappearing between my ass cheeks like that.

He moved deeper until I could feel his pubic hair tickling my bare butt.  I wriggled down on him with a satisfied grunt and then looked back with smoky eyes.

“You’re in my asshole, daddy,” I told him.

His hand came around in front of me and he gripped my throat tight.

“It starts at the mouth,” he said, pushing two fingers through my lips.  He dragged them out of me and pinched again around my throat, so tight that my head started to turn light.

“Then it goes into esophagus,” he whispered, his mouth close to my ear.  “From there it goes down.”

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