All of them- to warm you up.

"Before we start the real fun, I think that a little foreplay is in order," you say, "I know just the thing. You three can play with this guy."

You drop your trunks down quickly, exposing your cock to the open air and all 4 young ladies. All but Lexi smile (since she can't).

"I know just the way to do this," Justine says, "Remember what we did with the Jacobs Brothers?"
"It would be a little different with only one dick," Diddy says, "Still sounds like fun. You in?"
"Oh yeah. I loved that time," Melanie says, "Let's do it. We need to move the lucky lady first though."

With Justine's help and guidance, you move Lexi and the chair she's cuffed to in a position where they are parallel to the front of the Pool. You don't know what is going to happen next, but you're excited.

The trio walk in front of you. One by one, they take off their bikini tops, exposing their nubile breasts.

Justine's are nice, big DDs! Diddy has some nice C-Cups that are shaped perfectly. Melanie's are smaller, but still sumptuous.

They walk past you and step into the Pool, standing in the water. At the lower height they are now at (thanks to the incline), they are right at eye level with your dick. Now you get it...

They each approach you, eyeing your member. Justine makes the first move (naturally) by grabbing your dick. Diddy and Melanie (flanking her) reach out and play with your balls.

You glance over at Lexi and see that she is staring right at the action. She could always close her eyes...but she doesn't.

As Justine leans in to start licking your cock, you wonder how long you can last.