Answers!

Hell so I believe you can imagine what the pair of us looked like and felt when we left her place a little after three AM. We left Susanna in the middle of a puddle of cum. Before we left I checked her eyes to see if there were any signs of a tick. Nothing, I was stumped then as to what could have caused it.

We got out of her building and made our way back to where we left the car. Our driver, who I finally learnt was named Louis, got into the driver’s side, got something out from the footwell and took it around to the trunk. I watched him wondering what he was up to!

When he came back to the driver's side, he must have wondered what I was thinking, “Glass cleaner, I topped up the window washer tank before I picked you and her up tonight!”
Then it came to me, “Tell me, was the cleaner in the backseat when you took us to the university’s fundraiser dinner?”

“Probably! I have a habit of just leaving it wherever I’ve last used it!”

That would explain it the chemical formula of the windex reacted to the pheromones I sprayed Susanna with, resulting in a mild tick reaction. It was something I could prove easily with a simple blood test and since I had a needleful of Susanna’s blood already at the lab. With a light bulb over my head I looked to Louis and told him to take me to the lab.

He thought I was crazy, but did exactly what I asked him to do. I unlocked the lab door and was about to get down to testing her blood when Louis, who I thought drove away, asked me from just inside the closed door. “Hey Professor Cartier, If you don’t mind me asking, did you give Susanna anything special if she spent the night with us?”

I had just gotten Susanna’s blood into a vial about to place it into a centrifuge when I actually thought about Louis’s question. Come to think about it, I only instructed Susanna to sleep with us once! What made her more than willing to let us enjoy her body over and over? Thinking of what could be going on I lied to Louis. Telling him no, In case he decided to get Susanna to do something for him.

Knowing I had a good half hour to kill, I told Louis that I would make my own way home, or might just sleep in the back room. Louis accepted that them left, giving me time to really think about the ramifications of what Susanna’s actions after our initial fucking of her meant!. When the blood was finished spinning with the window cleaner formula, I noted the chemical reaction on my eyes- a slight tick!

Ah ha! I found it and now I was ecstatic that I didn’t have to worry about instructing Susanna that I didn’t even bother going to the back room, just sat down in my chair and drifted off to sleep. I had no idea what time it was, nor where I was when the door opened and in came a fresh looking Susanna. The first thing out of my mouth wasn’t, “Good Morning!” Instead it was “Show me your breasts!”