Tami and Claire invite them to watch

Click.

The bathroom door unlocked. Sonya and I turned towards it, wondering if we'd really heard what we thought we had. A second later, the doorknob turned and the door swung open, just a crack.

Oh my god.

With bated breath, I took Sonya by the hand and walked across the girls' apartment, standing nervously outside the unlocked bathroom door. Were these girls doing what I thought they were doing? Were they really inviting us to—?

Sonya opened the door before I could finish thinking.

I almost lost it when that door opened. I almost came, just from the sight of what awaited us on the other side of that door.

Tami and Claire were PAWING at each other behind the glass shower door. Smooth thighs, rubbing together. Slender fingers, gripping soft skin. Lips and tongues, eagerly exploring.

Every inch of their hot, soapy bodies was on full display for Sonya and I.

At first, they were too lost in each other to pay us much attention. But eventually Tami's nervous eyes swiveled in our direction and saw the lust on my face.

She immediately turned her attention back to Claire and gave the girl a ferocious kiss, moaning:

"Oh god, Claire, they're right there! They're really looking at us!"

We really were.

As they kissed, their glorious tits mashed together—slipping and sliding all over the place from the soapy water.

Claire hazarded an amorous glance in our direction, then gasped in surprise as Tami urgently dropped her mouth to the girl's wet nipple and started sucking.

Never taking her mouth away from Claire's perfect tit, Tami deftly reached a hand down between her lover's legs and started rubbing—

"Mmm..." Claire moaned, her fingers grabbing a handful of Tami's long black hair.

I took a moment to appreciate how beautiful Claire's tall, graceful body really was. Though I'd briefly glimpsed Tami naked all those months ago, I had never once seen her beautiful copper-haired girlfriend in the buff.

"I had no idea Claire was completely clean-shaven down there," I whispered to Sonya.

"Eight weeks of fantasies, and we've been getting it wrong!" she whispered back.

Claire's cry of pleasure brought us back to attention. She was getting close to her limit, but she wasn't going down without a fight. Suddenly dominant, Claire pulled Tami's mouth off her breast and pushed the girl back against the wall of the shower. Then she grabbed the detachable shower nozzle off the wall and slid it down along Tami's body—over the shape of her enormous breasts and wide, healthy hips—until it was pressed firmly against her clit.

Their mouths crashed together once again as the rubbing resumed, Tami with her fingers and Claire with the showerhead. Steam filled the bathroom, giving the whole scene a hazy, almost unreal atmosphere.

The moaning and groaning in the shower intensified, until both lesbian lovers were teetering on the brink. They turned towards Sonya and I—looked at us, looking at them—and then they climaxed together in a beautiful harmony of sexy screams.

We both applauded their performance.

"That was like, the sexiest thing I've ever seen," Sonya breathed.

The duo of naked girls stumbled out of the shower, still embracing one another in post-coital bliss.

"That was like the sexiest thing I've ever DONE," Tami laughed.

"Now it's your guys' turn," Claire insisted. "You two need to rinse off all that icky chlorinated water, too."

She was looking at Sonya as she said it, plainly ogling my girlfriend's skimpy g-string bikini.