Coming to their senses.

Beth lost herself in kissing Kyle. His strong arms were encircling her, lifting her out of the water as her legs straddled him. His cock was erect and stiff, and it pressed between them, against her clit in an maddening way.
"He's..." Kyle said into her ear. "...a damn fool."
"Thank you..." she rubbed herself against his tool, letting him kiss her neck and chest, and suck on her nipples. Oh god, just lift me up so I can slip it in me.
"You're a smoking hot girl..." Kyle whispered, putting a hand on her left tit and cupping it. "And Lord knows... I have reason to want to stick it to Brian."
"Wh...why?" Beth asked. Why is he still talking?... why hasn't he started fucking me yet?
"He fucked my girlfriend when I was deployed the first time. I caught them in bed together when I came home a day early for leave."
"What?" Beth stopped trying to maneuver her way onto his cock for a moment. "Seriously? Brian?!"
"Yeah. He's not the straight arrow he pretends to be... well, he might be now, that was three years ago, before he met you." Kyle cursed. "Fuck... I should just keep my mouth shut when something good is happening." He lifted her off his lap, and got out of the pool.
"What's wrong?"
"What's wrong is, we're both hammered, and we both have pretty selfish reasons for doing what we're doing right now." He toweled off. Beth couldn't stop staring at his ass...his legs... his swinging cock. "That's not fair."
"I...I guess... you're right." She had to admit it. Booze and frustration were driving the car for her. "You're a good man, Kyle."
"Let's go back, sleep it off, sober up." He knelt down to touch her cheek. "...and not do something rash."
But I want to do something rash!!
"Damn it..." she followed his lead, climbing out of the pool. Kyle made no effort to look away, and instead, shook his head.
"I must be a fucking idiot..."
"That's sweet..." she wobbled over to plant another kiss on him, and he folded her up in another embrace that pulled her up to tiptoes. They dressed, and headed back to the townhouse. There was no sign that Brian had woken up, and when Beth went to check on him, he was still breathing deeply and hadn't vomited.
"He okay?" Kyle whispered from the doorway.
"Yeah." She turned back to stand in front of him, rubbing her temple. "Look-"
"Maybe we shouldn't talk here..." Kyle whispered, and Beth nodded.
"Right."
They sat on the steps, talking quietly. Kyle explained a little more about what had happened with his ex-girlfriend and Brian. She had been a bit of a slut, and had probably come on to Brian. "You look like her, too. That's the worst part."
"Oh? I guess he has a type." she growled.
"I nearly broke his arm, and gave him a black eye besides, and we didn't talk for nine months. But we've patched things up... a little. He's always had my back since then, and I've tried to forgive him."
"Tried?"
"Hey, I take it one day at a time... and trying to fuck his fiancee in **** is no way to go about things." Kyle looked at her, and she blushed. "I meant what I said, though. He's a fool to neglect you. I hope he gets his head out of his ass because only an idiot would risk losing someone like you."
"You have to stop being so sweet, or I'm going to be real stupid..." she mumbled.
"Maybe in another life, Beth." He kissed her on the forehead. "Go sleep with your man."
Beth lay awake for awhile next to Brian. There was a lot to process, and the booze was wearing off, leaving her with a vaguely sick feeling. What she had almost done, what she had desperately wanted to do, it had been wrong but... Brian, why didn't you ever tell me about.... that was a silly question. What man would want his fiancee to know about something like that?
Sleep brought unconsciousness, but not a respite from troubled thoughts.