Sexy Samantha--Younger Coworker

She's younger (28), thin and blonde, and she has a wicked gleam in her eye.
Today she was wearing jeans that hugged her sweet ass and a fuzzy angora sweater that showed off her slim waist and the full curves of her breasts.
When I walked into the office, she was stretching her arms over her head.
Her sexy belly was bare and my eyes went right to it. She saw me and smiled.

After lunch, neither one of us had a class. I was planning a Starbucks run and asked if anyone wanted anything. Samantha answered yes, but said she wasn't sure and wanted to go, so I smiled and agreed.

In the car, she fastened her seat belt behind her back and turned to look at me as I started the engine.

"You know this whole town," she began as she looked into my eyes. "Drive me somewhere quiet and I'll show you what you want to see."

I smiled and put the car into gear without a word. As I left the parking lot, she slipped to her knees in the foot well and unzipped my pants. Within seconds, my cock was stiffening in her mouth and she was moaning happily while I drove.

A few minutes later, I pulled into a quiet train station and parked at the back of the lot. Samantha just grinned and stroked my cock for a moment. Then she let go, crossed her arms, and whipped her sweater and t-shirt over her head, revealing her gorgeous breasts and tight pink nipples. Her skin was pale and creamy and looked silky smooth.

When that was done, she turned and sat on the seat again, kicking off her books and then sliding her jeans down her long, trim legs. With a smile and an agile movement, she was straddling my lap, her head pressed against the roof of the car as she grinned down at me.

"Now what were you looking at?" she whispered.

My hands came up to grab her tits and my head bowed to kiss the soft, firm skin of her belly.

"Every sexy inch of you!" I growled as I tasted her.

"Well, here I am!" she laughed. "And I'm so fucking horny!"

My hands moved down to her ass and squeezed firmly.

"What are you gonna do about that?" I asked with a grin of my own.

Holding my gaze, her hand slid down from between her breasts, followed the line of her abs, and dipped into her panties. I saw her fingers moving through the silky fabric and then emerge. She cocked her head at me and touched my lips with two fingers. I sucked them in and groaned as I licked off every trace of her sweet pussy juice. Then Samantha said what I was hoping to hear.

"I'm gonna fuck you--" she said hungrily, "and I'm gonna cum all over your married man cock and you're gonna fill up my tight little engaged pussy with your cum. And it's gonna be in there all afternoon when I'm teaching!"

Before I could reply, she pulled her panties aside with one hand and lifted my cock with the other, scooting her knees toward me to get the angle right. As she rubbed me along her slit, she moaned softly and closed her eyes. Then she sank down on me all the way in one sweet, sexy motion and our lips met.

I have no idea how long she rode me--my mind was a blur of sensation and joy as I pumped up to meet her and my hands roamed her agile young body. Her pussy clamped down when her orgasm hit her and I held her tightly while I kept myself still, letting the waves crash through her. When she opened her eyes, she seemed determined to make me cum. She rose up a little bit and stared down at me, her hair a curtain around her face, as she pistoned up and down, her hairless pussy now slick and hot with her orgasmic juices.

When I started pumping up to meet her again, she murmured encouragement.

"That's it!" she whispered. "Fuck me. Fuck me and cum in me!"

I was done in just another minute--my hips shot off the seat and I pulled her sweet little ass down hard against me while my cock throbbed inside her. Spurt after spurt splashed into her and she held still with her hands clasped behind my head, moaning with each fresh wave of cum inside her.

Ten minutes later, we were at Starbucks, grinning happily and trying not to look guilty.