"Let's give Rachel the same pleasure we've given each other."

Ria hesitated, her eyes darting between the ground and my own. She finally looked up at me with an intensity that took me by surprise. "Let's give Rachel the same pleasure we've given each other," she said, her words dripping with desire. It hit me that she had feelings for Rachel too. The scent of Axe spray still lingering in the air, reminding me of our previous encounters.

Ria slowly undressed, her movements almost hypnotic as she made her way to my sister's bed. I followed suit, unable to resist the pull of her seductive energy. As I climbed onto the bed next to Rachel, who was still moaning and panting in ecstasy, Ria took control and gently placed her hand on top of Rachel's hand, which was rubbing her clit. With her other hand, Ria turned Rachel's face towards hers and kissed her passionately.

Rachel's eyes flew open in shock before melting into a state of bliss under Ria's touch. I couldn't help but join in, placing my arm around Rachel's chest and a hand on her breast as my body pressed against hers. Rachel seemed surprised by my presence at first, but it didn't take long for desire to replace any hesitation or fear in her eyes. She kissed me back with fervor as Ria deepened their embrace.

I felt a rush of excitement and adrenaline course through me as I circled my fingers around Rachel's nipple, feeling it harden under my touch. Her breath hitched and her moans became more **** as I continued to explore her body.

"What...what are you doing?" she managed to gasp out amidst our heated kisses. My cologne filled her senses and I could see the desire burning in her eyes.

"Something that Ria and I have wanted for some time," I whispered huskily, glancing over at Ria to confirm my words. Rachel shuddered in my embrace, the realization hitting her that she had been harboring similar desires for us.

"We...we can't do this," she protested weakly, but her eyes never left mine, hunger and need still evident in their depths. "You're my brother."

"We can do this," Ria interjected, kissing her again while squeezing her breast. "As long as we keep it between us, it'll be our little secret."

At that moment, Rachel rolled onto her back and stated firmly, "We have to keep this a secret. No one can know."

Ria and I both agreed in unison, "No one can know." It seemed to satisfy Rachel's worries, at least for the time being. But as Ria began to lick and suck on Rachel's nipple and breast, I couldn't help but feel conflicted. Yes, this was something we all wanted, but the fact that she was my sister made it taboo and forbidden.

As Ria pleasured Rachel's breasts with her mouth, I ran my fingers through Rachel's hair, pulling her face towards mine for another heated kiss. But as much as I wanted her, I couldn't shake off the internal struggle of our relationship.

Rachel broke the kiss and turned to Ria, taking her face in her hands and kissing her deeply. My hand slowly moved away from her chest and down towards her inner thigh, lightly grazing the soft skin as I explored further. Rachel's breath caught in her throat as I gently touched her wetness.

Ria and I continued to pleasure Rachel together - she sucking on a nipple while I teased her clit with my fingers - but all the while, a voice in my head kept questioning the morality of our actions. Despite our agreement to keep it a secret and continue indulging in our fantasies, there was still a feeling of guilt lingering within me.

But as Rachel whispered, "I'm in heaven. I've been fantasizing about you both for hours in every position," I couldn't deny the pleasure pulsing through my body. The conflict only added to the intensity of our forbidden encounter, and for the moment, I let myself get lost in the passion.