"You're so wrong!" Damn you! I know what I saw!" Frank shouted, his fists clenched, knuckles glowing white. "I saw you yesterday. And I damn well know...where you two were going when I caught you trying to slip off from the rest of us!"Neither Bret or Karen answered."Did you think I was stupid?" Frank continued to rage. "Did you think I was blind?" Frank, calm down," Jason interrupted. "Take hold of yourself and tell me what's going on here."Frank twisted around, his eyes wide and wild. "It's. She gave a small whimper and moaned as he slid deeper into her and soon was buried up to his hilt. He then began the slow in-and-out movement in between kissing her lush breasts and lips.It was a minute or so later that a movement on the steps leading upstairs caught his eye. He strained his eyes until they finally focused and couldn't believe what they saw. For there, seated on the third step from the top and barely visible in the shadows was her sister, Kathy. She had one hand down the front. “It’s a surprise, so don’t try to spoil it,” she admonished as she scooted back out the door.Belle at least had found a way to take my mind off the looming unpleasantness in San Elizario, because now all I could think about was being banned from my own apartment. As I trudged towards my office, carrying my clothes for the evening, I vowed that it had better be one heck of a surprise, or Miss Belle was going to get her pretty little ass tanned.I was still bitching to myself when I plopped down. “Aaaaaaiiiiii!” I thought the couple downstairs would hear despite the soundproofing. I pulled my cock out and then jammed it in as hard as I could. A whoof of air escaped her lips from the impact, and I heard my ball-sack slap her tight, young ass.“Who’s your master?”“You, sir!”I slammed my cock in several more times.Her whole body tensed. Her anus reflexively clamped down on my cock a couple of times, but I kept up the pace. It had to hurt. “Should I stop?” “No, sir.”I started to hump her ass.