Take off the panties

One pit stop at the Student Center later and I felt much breezier down below. I very carefully made sure that no stray gusts exposed anything. At least my skirt was down to my knees; any shorter and I would have been too nervous just walking there. My panties were safely in my backpack, far from any sticky fingers at the apartment.

Ringing Kevin's doorbell, I felt a strong pang of trepidation mixed with something like lust. I almost wanted him to just pull me in and use me like he had before. I had texted that I was on my way when I left the Student Center, but only now did I begin to actually think about my stupid decision. I started to swear to myself that I would put my panties back on and keep my legs firmly closed, but was cut off by Kevin swinging the door open.

He must've just gotten out of the shower, because he was in just a t-shirt and some briefs which all too clearly outlined his cock. He held the door for me as I walked in, the sounds of him closing and locking it moments after. I yelped in surprise as he gave me a quick slap on the ass, leaving his hand there for a long second to cop a feel through the skirt. I sighed in resignation, hoping that would be the start and end of it, setting my backpack down and getting my laptop out.

"So how much do we have to get done?" Kevin asked, sitting next to me. He still hadn't put on any pants, and he seemed to have gotten quite the kick from slapping my ass.

"Probably like an hour of work, maybe two. We should be done before lunchtime for sure."

"Awesome. You wanna type and I'll just read off data or anything when you need it?"

I nodded, starting to type. I let myself become immersed in the advanced science, safe and distant from men or relationships or sex. Kevin dutifully read off information from our lab manual, his leg ever-present and pressed against mine. A little ways in, his left hand moved from his leg to mine, ever so casually weighing down my lower thigh. Every minute or two, he would move it up a little, my leg seemingly so sensitive to his hand. Once he got to just under the hem of my skirt, I thought about slapping him away or stopping him, or maybe just letting him go a little further.