Jennifer gets you ready first

Marcus seemed a bit hesitant, sitting there in his boxers. With you and his wife both completely naked though, it was clear that he had to follow through. The fact that Marcus hesitated made you even more confident though, he didnt seem like he was eager to expose his cock.
Still, you decided to speed things up.
"Tell him to hurry up a bit." You tell Jennifer.
She looks at him, tape measure in one hand, and besides that, completely naked. "Yeah Marcus, what are you waiting for? This will be fun."
Marcus seemed to convince himself, he stood up, and let down his boxers.
A smile snook unto your face. He wasnt fully hard yet, only like semi-errect, but yet you could already see the distance.
"Alright", Jennifer said, "Now come over here, both of you, so I can measure you."
You´re still surprised by all of this, it was comlpletely her idea to do all this, but you havent forgotten about the prize you suggested. Even though you didnt yet agree upon what exactly the price would be, you have a pretty clear idea in mind.

Jennifer kneeled down between the two of you, each one of you on one of her sides. "Lets get both of you onto a competition level." She said, laying the tape measure aside.
Then she grabbed your dick with her right hand, and her husbands with her left, slowly jerking both of you off to get you as hard as possible. You decided to use the moment to further influence Jennifer, although you dont even felt like it was really necessary, as eager as she was.
Still, you said: "You´ve been waiting some time to do this, havent you? To see how your husbands cock compares to mine? You´ve been looking at me walking around the appartement, wondering what I was keeping hidden in my pants."

Jennifer bit her lip and nodded, her eyes were fixed on your cock only, Marcus seemed like an afterthought. "Been waiting some time..."

"Any now you´re happy to finally compare the two of us. It makes you really happy, and that makes your husband rellay happy."

You added the last sentence to assure that Marcus was still on board with all of this, you didnt want to push your luck to much. You quickly looked up at him, but he looked down at his wife, managing the two cocks.

"Alright" Jennifer then said, "looks like we´re ready to go."