Creaming.

Lindsay began to buck harder and harder against Jake's thrusts, until she was screaming with a body shaking orgasm. "That's right...you fuck me so good, Jake..." the lust in her voice was too much for Beth to bear. She came hard, rubbing her clit furiously with one hand while holding her moans with the other. Her bikini was wet from pussy juices, and once her orgasm passed, she tottered away as quietly as she could, practically diving into the water to disguise the wet spot.
"Everything okay?" Tim's voice nearly made her scream in surprise. She hadn't noticed him swimming up to the boat.
"What? Yeah it's fine..." She thought her face must be red as a beet between arousal and embarrassment.
"Did you.... what I mean is... are Jake and your friend on the boat?" his question was suggestive: he probably knew what was happening.
"Yes. I... I didn't want to..."
"Say no more. My cousin is banging his girlfriend on the beach, so I decided to enjoy the water a little bit."
"Seems like everyone's pairing up."
Tim laughed. "Yeah... it's a shame you're engaged." He suddenly grimaced. "I'm sorry that was..."
Beth smiled. "It's okay, I'm not offended."
"My mouth always gets me in trouble." he seemed genuinely embarrassed.
They chatted for a few minutes about nothing important, until Jake and Lindsay emerged onto the deck of the boat. Lindsay had a smug smile for Beth, and Jake was trying to look like he hadn't just been fucking her.
Tim and Jake headed back to the beach to gather their stuff: it was getting time to head back. Which left her alone with Lindsay.
"I...." Beth didn't know what to say as she sat with Lindsay on the rear deck of the boat.
"Did you enjoy the show?" Lindsay's tone was playful without being mocking.
"I don't know what possessed me..."
"It's called a sex drive, girl."
"It was inappropriate." Beth was trying to apologize, and Lindsay was acting like it was no big deal.
{if Formation = 5
}"It's not the first time you've seen me getting railed."
"That was a long time ago..."
"Well, I{else
}
"You watch porn, don't you?"
"A little, I guess..."
"This wasn't any different." Lindsay shrugged. "I{endif
}'m glad I could help you get a little voyeur action on. You know I don't mind an audience."
"Can we just...get on with the rest of our day and pretend that didn't happen?"
Lindsay laughed, clearly amused. "Sure, babygirl. Whatever you want."