Double blowjob

The two of them move you to the back and center of the bed, sitting upright. They move to separate sides of you and get on their knees, facing each other.

"We've never done this together," Katie says.
"...but we have done it with other women separately," Samantha says.
"It has always been a fantasy to do it together though."

They both lean in and start to play with your cock. Their hands touch it on both sides- a wonderful feeling. They look at each other and then at you.

"You can play with both of us too," Katie says.
"You know you want to."

You smile at the pair and reach your hand around towards them. You start to rub both of their asses as they spread their legs a little for you, inviting entry. You eventually take the invitation.

The pair lean down and start to kiss your cock from both sides. They lick it as well, their tongues and lips occasionally touching.

"That tickles," Katie says.
"Sorry about that," Samantha says, nervously-giggling.

The pair keep up the action as you start to rub their pussies. You can hear them moan against your member in unison.

Eventually, they step it up again...

"Only one of us can suck that cock," Katie says, "The other will get those balls."
"It is yours if you want it," Samantha says, giving your girlfriend a light kiss.
"I appreciate that. I do love his balls though."
"Should we let him decide then?"
"Not a bad idea," Katie replies.

The pair look at you with lust in their eyes. Which one do you let suck your cock?