I'm your girlfriend and we just finished up class, I'm chatting with you and notice you've been staring at my chest. I didn't notice my nips were visible through my shirt, pretty embarrassing but I turn the situation around and tell you I'm horny and we should sneak into one of the side rooms in the library. We've never had sex before so I just want to tease the fuck out of you. I play with my mouth, nips, and finger myself for you to watch. I get pretty into it at the end, basically pretending you're fucking me hard and cum. I finish up and promise we can fuck soon