You decide to keep acting dumb and ask when the other boy will be joining you?

You make no attempt to escape, but rather decide to keep acting oblivious to your situation.

"Umm, will the other boy join us soon?", you ask Marvin and see that your question seems to somewhat amuse him. You can see his dick slightly twitching in his pants. Is he enjoying this?!

"Yeah, he'll join us soon enough", he says and takes a step towards you. All of a sudden you're not too sure if this all was such a good idea after all.
"But don't you worry about it. I don't think we two need to wait for him..."

You understand what he means and it makes you hold your breath for a while. You can feel your heart beat rising.

"Umm, I'm not so sure...", you say, stalling while trying to think of the best way to proceed in your situation. Marvin is definitely not the kind of a man you ever imagined having your first time with. But still on the other hand, he could definitely fulfill your fantasy of being with a bigger, older man.

What do you do?