The truth of your suggestion to her

"When I told you earlier to 'take care' of our guest..." You whisper softly in Rachel's ear, and can feel your own arousal growing while you hold her in your arms and share your naughty imagination. "I didn't really think that you'd stop by kissing...!"

"What do you mean...?" She returns, in the same low tone, while she gently pulls back to be able and meet your gaze. It's easy to tell that she's already knowing the answer though, and the blush on her cheeks seems to deepen even further, while there's a spark of lust appearing in those beautiful eyes.

"I think you can figure it out on your own." You tell her, still in that low voice, and then pat her gently on the butt while you turn her back to the stairs. She hesitates to start walking though, but just stand there with the bowl and bag of chips in her hands, smiling at you lovingly over her shoulder until you pat her again - just a little bit harder than the first time. "And don't come back here until I've heard you squealing!"

"How kinky...!" She just grins at you mischievously, before finally making her way back up the stairs again. You wonder if she'd actually go through with it though, as she's seeming a bit torn between her love for you and that to her ex, but hope that she'll at the very least be more at ease with your vocal permission.

It's just a couple of moments after the door closes behind her that you hear a burst of laughter coming from upstairs however, which is followed by a long series of loud giggles, before finally being lowered to a more normal tone of chatting.

This time you can hardly keep your curiousity in check though, and soon you find yourself at the top of the stairs again, listening to the voices from inside Rachel's room...