Use his crush against him

You make your way back out to the pool and sit down, not in your old spot but right next to Alex. He turns to look at you, and you can see his eyes bulge when he does.

"Uhh, dude?" he asks. You can tell he's trying not to stare at the cleavage you're now showing.

"Yes, Alex?" you ask, reaching up and playing with one of your pigtails like you saw Gwen do fairly frequently.

"Wh-what are you doing?" he asks, shifting his legs.

"Well, your comment about me looking like Gwen got me thinking, and I figured I would see how far the comparison went. So, what do you think?" You move a bit, perching on your knees and leaning forward so that your cleavage is even more on display. "Who's hotter? Me or Gwen?"

Alex's mouth drops open, and he seems to be struggling to speak. After a moment, you fear that you may have broken him. The look on his face doesn't change at all. Finally, you lose your composure and start laughing.

"Oh man, you're sick dude." you say. "You really popping a boner looking at me."

"What the fuck do you expect?" Alex asks, his face turning red as he looks away from you. He lifts one of the bottles of booze and moves it toward his mouth. You reach up and grab it away from him, then take a quick sip yourself. It warms you up a bit.

Well, that and the sun. It's starting to get really warm already, and it feels worse now that the sun is on more of your skin.

"Say, you wanna help me out?" you ask. "I think I need sunscreen."

Alex's eyes bulge again, causing you to laugh. "Uh, really?"

"Yeah, man. A sunburn is just what I need right now. That'd make me even more miserable. Come on, help a brother out."

Alex laughs nervously, but nods. You grin. "Thanks, man. I'll move to one of the chairs, okay?"

He nods again as you stand. You stumble with your first step, but then make your way to one of the reclining chairs. You fall onto it, your back facing up. You can feel your breasts squished under you. Uncomfortable and odd.

You hear Alex approach, and can see him pick up the sunscreen. You Smile and wink at him. "You can pretend I'm Gwen if it helps."

"God, dude..." he says. You turn your head so you're facing forward and laugh again. You hear Alex squeeze some of the sunscreen into his hands and jump a bit when you feel him touch your shoulders and start rubbing it into them and your neck. He spends a few minutes doing so before moving to your arms. Once they're done, he starts moving down your back.

You smile to yourself as you realize that you have another opportunity to fuck with him. "Get every spot." you say. "I really don't want to burn."

Alex grumbles something, but continues working. After a few moments, he has finished your back and begins working on your legs. He starts low and makes his way up from your feet. The further up he travels, the more you can feel something stirring. A strange sensation from your stomach and a wetness growing in your borrowed bikini.

As he reaches your upper leg and thighs, you can't help but to gasp and moan a bit as he rubs the lotion in. Each pass feels more intimate than the last. Almost too soon, he's finished and pauses. You hear the sound of more lotion being dispensed, and then he rubs some onto your exposed ass cheeks. Even that feels nice, though not as nice as your thighs.

You know he's done with your back, and you're at a fork of sorts. End the joke here, or keep going?