“Hmm?" Monica popped her head off me and turned to look into the backseat.

Ellie had quite the self-satisfied expression on her face as she reclined back against Nate's chest. One of his hands was underneath her skirt and the other cupped a breast from underneath her sweater, and from the flushed Look and sweat on her forehead, she seemed to just be coming down from quite the orgasm.

“Come on, aren't you just a little curious?" I saw Ellie's arm wiggle and then Monica's gaze dropped down towards Nate's crotch. I saw her eyes go wide as she must have been seeing Ellie's hand wrapped around his hard erection.

My view was blocked by the seat, and I wasn't particularly interested in seeing it for myself. Instead, I was locked in on Ellie's half-naked body. Sure, I'd seen her in a bikini before, which covered far less skin. But if Nate moved his hands just a few inches in select directions, I would be seeing Ellie's pussy or her nipples for the first time.

I glanced to Nate's face. He was similarly staring straight at Monica, no doubt imagining all the things he could be doing with her. And believe it or not, I wasn't feeling jealous. I knew of his submerged crush on her and I couldn't begrudge him for the feeling the way he did. No way would he turn down any opportunity with my gorgeous girlfriend.

But his opinion wasn't the one that mattered. Nor mine, really. It was as if all four of us knew the only possible objection would be coming from Monica. And after a long, pregnant silence, Monica finally exhaled.

“N- no, we shouldn't." Her statement did not carry the note of finality I had expected.

"Come on..." Ellie's voice was a purr. "No sex. No commitments. Just once, play around a little or you'll be wondering for the rest of your life what it might have been Like. More to the point, your boyfriend will be wondering for the rest of HIS life. But here you can supervise him and we've got a time Limit. It's the best chance you'll ever have."

I could see Monica take a deep gulp. Her right hand was still on my hard cock, and she was absently stroking it while staring down at

Nate's. Neither of us had ever touched another person sexually before.

Were we really ready to be monogamous forever, never knowing what could have been?

"No sex. And just this once," Monica stated flatly to nobody in particular, and then she had Let go of me and was popping the passenger door. Ellie quickly opened her door and the two girls switched places in a matter of seconds.

Nate almost went catatonic as Monica slid across my backseat and tentatively wrapped her hand around his bare, bulging dick. I saw this in the corner of my eye before Ellie climbed in next to me and was soon leaning across the seat, her face only inches from mine.

“Hey there, hunk..." she cooed.

I was frozen in trepidation of what was about to happen. When she first moved to kiss me my head automatically backed away. It was a conditioned response to her flirting with me for the past year and my struggle to be loyal.

I glanced into the backseat, and saw Monica and Nate tentatively coming together for their first kiss. Nate clearly wanted it, but like me,

Monica seemed really, really nervous.

Ellie caught my reaction and turned my gaze back to her. She fixed me with a lopsided grin.

“Come on, just imagine I'm Cherys."

My jaw dropped as my dream girl's image dropped over Ellie's similar features. And then she'd taken advantage of my unmoving state and gaping mouth to press her own open mouth against mine.

I swear a Lightning bolt came down out of the heavens and zapped us.

Maybe it was punishment for our immoral activity, but it sent a crackle of electricity up and down my spine.

Now I'm not going to say anything bad about the chemistry between me and Monica. We'd always had passion. But there was something about this first kiss with Ellie that sent a thrill into me like nothing else. I knew immediately that it had changed me forever.

I gasped into the kiss and then I heard a similar moan come from the backseat. My eyes were closed as our mouths pressed and retreated, massaging and rubbing as I inhaled Ellie's spicy sweetness and sent my tongue in to wrap around hers.

It was so... wrong... that I couldn't have been any more aroused than I was at that moment. Here I was, french kissing Ellie, half-dreaming of her sister Cherys, while my girlfriend Monica was in the backseat making out with my best friend.