Straight from the source

You do not want to do either of those things, but there is a small sub in your head that is making all the decisions right now and judging from your raging erection that kinky sub is truly enjoying this.

"I'll suck you" you say meekly.

"What did you say?" asks David mockingly.

"I'll suck your cock" you reply equally quietly.

"That's it baby, be our little cocksucker" cheers Jesse.

You lean towards David's cock and wrap your lips around it, you have no experience at giving blowjobs, but you do know what you enjoy receiving, so you try to replicate all the proper moves. You wrap your lips tightly around the base of the head and begin to suck it, while at the same time licking it vigorously with your tongue.

"Oh fuck, John! You're a natural! How many cocks have you sucked to learn that?" mocks you David, but with genuine admiration in his voice.

Jesse looks at you in silnce with excitement and lust in her eyes.

You take the cock deeper into your mouth and begin to move your head back and forth, you do not dare to take it into your throat, that would require actual experience. But David has been fucking Jesse for a while and he does not need much more stimulation.

"Ahh! I'm going to cum! Swallow every drop, ****!" he yells as he grabs your head with both hands.

Fortunately he does not push his cock deeper into your throat, but still his entire voluminous load begins to fill your mouth. You have **** but to swallow as much as you can, but with the cock still in your mouth and the awkward position it is hard to accomplish; some of his seed begins to ooze our from the sides of your parted lips. How can anyone cum so much?!

Ultimately David finishes shooting his load and withdraws his cock, you feel as if you had swallowed a glass of cum, yet there is still semen on your chin. Dutifully Jesse leans and licks the seed off your skin, but she does not swallow it; instead she kisses you fully on the lips and pushes the cum into your mouth. You are to bewildered to object so you again swallow everything obediently.

"Oh fuck! That was awesome" exclaims David "and I see that you agree with me" he points at your erection "we'll have to do that more often. But you've been a good **** so far, so you deserve a little reward. You can jerk off, but be sure to lick your hand clean afterwards and swallow every drop."
"I got a better idea" replies Jesse.

What kind of perverted idea can she possibly mean?