At five o'clock, we headed upstairs to freshen up for our 7 p.m. reservation at Wing Lei, the Wynn's excellent Chinese restaurant. We were tipsy and high, carrying the perfect buzz. We rode the elevator with another couple coming up from the pool. The woman, wearing a thong, hung off her muscular husband's arm. Her diamond ring shone brightly.

"Suck me," I whispered in Kat's ear. She looked astonished and shook her head. My face turned cold and stern. She put her hands in my waistband and lowered my trunks a bit. Instead of kneeling, she simply bent at her waist and gave my cock a long lick, then put...