Girlfriend's Dirty DILF

Glenn is different, imposing, protective, and also... my girlfriend's dad and History professor. He's a tough guy. He picks on me all the time, afraid that I'll upset Victoria. He makes me feel small just by being near him, and I'm certain he knows that. Thus, it's no surprise when he invites me over to his favorite pub, and I have to go. Thinking that he'll just iron out a couple of things about my relationship with Vic, the last thing I thought was going to happen was him finding out about a secret of mine. He makes something stir in my pants and I'm not ashamed of it.
I just never thought that it would bring me to my knees in front of him and that he was going to be dictating the pace of our brief... 'experience'. And to add to that, he was going to be exploring parts of me I didn't think anyone ever would. Characters are 18+