He wants you to fuck her (cuckold)

After conferring for a while, they turned to me. I turned my head slightly to the side to avoid looking at her husband's, admittedly pathetic, small cock. He started, "So we were talking and we have a proposal for you."

I faced them completely worried by the implication, "I'm so sorry, I really didn't mean to peak in at such a private time."

The husband just smiled and waved away my apology. Looking at my teacher she looked a little ashamed as she stared at her feet. I started to get a bit more worried here. "So as I said proposal. We've been talking about this for a while," he started off a bit mysteriously. His hand clasped his wife's hand and squeezed and he started to get more and more excited as he started to breath a bit louder and his face turned more red. "We've been talking about having another man join my wife in bed," he explained.

I looked at both of them a bit confused at what he was trying to imply, "I'm sorry?"

"Well," he smiled, "I was wondering if you ever thought about fucking her?" With that statement he squeezed her hand tighter.

I froze by the sudden question, "I'm not sure what you mean."

"I think you know what I mean, have you ever fantasied about sticking your dick in your tutor? Eating her out, making her scream in pleasure? I know you enjoyed all those times I showed her off to you and those pictures I sent you" He continued getting more and more excited.

"Yeah..." I say bewildered by this change in topic.

"Well how about it? Do you want to fuck her now?" He said conspiratorially.