Check on Samantha

{if Josh-Jenny-Hallie sex = true}{else}After Josh descended the stairs, {endif}I snuck to the master bedroom door. It was slightly ajar, and the lights were off. A faint light came in through the gap in the curtains. I opened the door a few more inches. Now I could see the bed more clearly. Samantha had pulled the sheet only up to her hips, leaving her breasts exposed. Her chest rose and fell as I watched. Josh must have waited until Sam was asleep before leaving for his assignation. If he was off to carry on with some teenage bikini model, I was going to see what my wife's sister was going to do about it.

I closed the door quietly and stepped to the bed. I dropped my boxers to the ground and let my burgeoning cock out. Then I slid into bed next to her and ran a hand up to Sam's far breast and cupped it, squeezing it firmly. She barely moaned, still deeply asleep. I began teasing her nipple while I squeezed it, and leaned down to suck her closer nipple. Now she groaned louder, and her head turned toward me. I fondled and suckled her for a minute, rolling her nipple, gently biting the other, until she gasped and woke up, her body quivering in pleasure. She probably can't see that it's me, as she squeals and moans through her orgasm.

"Oh, Josh! How did you make me come like that?" she whispered hoarsely, lust thick in her voice.

"I'm not Josh," I whispered just before I kissed her.

She gasped again, pushing me away. "Where's Josh? What are you doing here?"

"If you don't know what I'm doing, then I'm doing it wrong." I grin at her. "Josh snuck downstairs, probably because some bikini-clad teen caught his eye. I just came by to let you know, in case you wanted to take advantage of the situation." I watch her eyes.