Mutual Fuck With Art Student

It was the beginning of the semester at the Art Institute and I was pretty excited about my new schedule. Professor Ludovian always brought interesting nude models to his classes, and his tips on how to draw the human body were most useful. I had learned a lot in the intermediate class but now in this advanced class, I knew the professor was going to be more demanding.
Ludovian greeted his students with a grin and a wave of his extremely thin and graceful hands, the hands of a maestro, someone who had mastered the art of drawing the intricacies of the human body. "Hi Daniel, good to see you again...", he said. He greeted a few more students and then hurried towards his desk, where a robed feminine figure was leaning.
"Our first project will be due a week from today", said the slim and short of stature professor. " You will have the model here until Friday. I will assist and answer any questions, like always." He had a grin under his thin moustache when he announced this project's model. "Leticia is going to be our model. She has graciously offered her time. Get to work now..."
Leticia was leaning against the professor's draft table. She had on a white terry cloth robe. Obviously, she had changed into it before we got to class. She must have been in her early 40's.She had straight soft brown hair, that ended just a bit below her shoulders. She looked fit, her long leg muscles were well toned and with a healthy tan. She glanced at the professor with an inquisitive look and Ludovian nodded slightly. She walked to the center of the class, disrobed herself and walked gracefully towards the wood platform, set up there for her to pose. About 15 students tried to catch a glimpse and started sketching.
I caught a glimpse of a perfectly rounded ass before I fumbled with my sketching paper and supplies. When I looked up, Leticia was facing me; sitting down with her legs wide open, displaying a huge, uncut penis. She had shaved her pubic area and left a little patch above her member.