The Deal

I've always been a good student and after getting into university my mind started to wander away from studying. I live my mother Joyce 42 divorced and she started to notice my grades slipping. Then she caught me masturbating and realized I wasn't studying as I should have been. I'm Kevin 22 a nerd I'm called even by my father Harold. But since starting at university I can't concentrate on my studies for all the young females around the university. Not game to approach them for dates, so I masturbated a lot. Joyce knew I'm not good with girls and kept to myself at mixed events. So she offered me a deal, if I could improve my grades back to there previous levels or better she would teach me all about girls and sex including actual sex intercourse with her. Joyce wanted me to succeed at university and have a good future. Joyce is good looking for her age and I've masturbated thinking of her often after seeing her in her underwear once. I accepted the deal and put a renewed effort into my studying. My grades improved and I was soon back to my former level. I was rewarded with her masturbating me and telling me if I came top at the final exams I would get to fuck her. I could say that would be easy for me to do, but there are some very smart people in my year at the university and it wouldn't be easy to do. I studied hard than ever and with Joyce helping me relax by masturbating me I was able to keep improving my grades. Then after the final exams I succeeded in coming top, but only just. Joyce was true to her word and she let me fuck her and since then she has me joins her in her bed regularly for sex. But if my grades drop the sex will stop.