I need some large, um, panties,” I offered.“Large? How large?” he asked, twisting the knife.“Well, she’s, uh, she’s a big girl, kinda...we...ll…she…”“Is she about your size?”Again, that blushing! “Yes.”Brian reached out and took me by the hand and pulled be toward the back the department…”Come on, let’s go over here…” We walked through a door marked “Private”, then into a shipping and receiving area that was empty that late at night.“Try ‘em on,” he said, handing me a package of hot pink lace. On the ride to her apartment I talked of some of my sexual experiences and she mentioned I should write a book. I let her know in no uncertain terms that if she ever wanted to experience an older man I would definitely be more than willing. She kind of shrugged it of as something that happens to her often, and I thought I should have maybe no come on so strong. I helped her carry her stuff into her apartment. Asked to use the bathroom, and was saying my goodbyes. She held out her arms so i gave. When she arrived to my office we had a very casual chat, I was friendly and wanted to see me as an ordinary guy beyond the 'professor's' image and she immediately understood it and started to ask personal questions e.g. where I stay, how long I will be around, if there are people to hang out with etc. I took the chance to invite her to a gathering with the master's class and some researchers that we were planning on Saturday night. I told her not to feel strange that she is younger since. She went right back to sucking me. The young woman said in a soft voice "yes". We found out that her name was Summer.I continued to get by blowjob, but now with a stranger watching. I grabbed the curtain and pulled it open so she could see everything easier.Summer looked like she was enjoying the show. Her nipples were rock hard under her halter top. She watched as Jenn bobbed up and down on my cock. Looking at me to see if I was enjoying it and oh was I!Jenn stopped sucking me and started to.