After brunch, we walked up the Strip and soaked in the sun. Kat's tennis skirt was brazenly short and frequently flipped up her thighs, coming dangerously close to revealing her bare ass. I loved the way passersby ogled her. Her nipples poked through the fabric of her tank top.

We walked up the Wynn and watched the waterfall show at the Lake of Dreams. We strolled the Venetian's canals and window-shopped. We kept up a brisk pace, and the exercise and fresh air felt invigorating.

"I can't believe how nice it is today!" I exclaimed.

Kat squeezed my hand. "It's perfect," she said. "The sun makes me want to go...