Amy screamed as I pulled her pink cotton panties down over the roundness of her beautiful golden bum, pushed her forward over the dresser, and let her watch her face contort in the mirror, as my thick cock pushed through the tight outer circle of her anus, and filled her tender asshole.
Karrie, just laid on the bed smiling sheepishly, listening to music through her ear buds, and knowing she would probably be next. Even though she pretended to be ignoring us, I could see her wince with every thrust I made into our younger sister's bottom.
Amy was the artistic one. She was young, bubbly and full of life, and there were times I actually enjoyed being around her. Then there were the times when she got on some crazy ass moral kick and tried to convert everyone around her. Like the day she brought me a bowl of squash stew, I made it damn clear that I would never become a vegetarian, and that as long as she was living in this house with me, her horny ass brother, she better reacquire a taste for meat.
The weird part about it was that it seemed she was always looking for excuses to do favors for me, going to the movies with her friends, a new bikini, or even just something as simple as a candy bar, then after I made her pay the price she'd complain about it for days, and act like it had been such a chore.
Karrie on the other hand, wouldn't ask for money, unless she ready needed it. Usually for personal stuff like razors, tampons, toothpaste, and that kinda shit. Otherwise she was happy just eating whatever slop I tossed on the table, and if she wanted to hang out with her friends, she usually just went to their place, or had them over for a game of cribbage. She was definitely the more practical one, but after having been spoiled for almost twenty years by our parents, she still didn't seem to have any plans to get a job in the near future.
I hadn't always understood why my friends had considered me a lucky guy to have two hot younger sisters, but now that they lived with me, and were at my disposal any time I needed a warm hole to blow my wad in, it was starting to make sense.
Amy's tears flowed freely over her bright red cheeks. She had been trying hard to keep her eyes open, not because she enjoyed the sight of her own agony, but because she knew that if she closed them she would be severely punished. She tried to maintain her balance by clutching the sides of the dresser, but I kept slamming her forward, watching as her tiny titties bounced with every movement.
I couldn't help it. Her pitiful screams, and that squishy sound coming from her ass every time my dick slid in and out of it, fueled a fire that had been smoldering inside of me for a long time.
It was obvious to anyone that knew us that my parents had preferred my sisters over me, but Amy was definitely Dad's favorite. He had spoiled the shit out of her since the minute she was born, so it should have come as no surprise to anyone that knew us, that even Karrie couldn't stand the little bitch. Now that the tables had turned, ever since our parents car crash, I was enjoying the sweet taste of revenge.
I had always been the responsible one, so it made sense that they trusted me with the inheritance.
"We have faith in you, that if anything happens to us, you will make sure your sisters are properly cared for." Dad had told me when they had showed me the will their lawyer had helped them prepare.
I know they respected the fact that I had paid my own way through college, owned my own vehicle, and a home in the city, but they must have underestimated the depth of my bitterness toward them, and the girls.
I suppose I should have felt at least a little guilt for abusing the power they had entrusted me with, but the truth was the girls were both over eighteen. If they had really wanted to, they were both capable of getting jobs and taking care of themselves. They were the ones who had made the choice to leave the solitude of the quiet little rural town we were raised in and come live with me.
After skating by on my parents coat tails their whole lives, I figured if they wanted to live large, then they should have to pay the price.
"How much fucking longer is this gonna take?" Amy asked between grunts and tears.
She had told me earlier that she wanted to go to the movies, but that she was broke, and wanted to know what she would have to do to earn some cash. I'm sure when she agreed to let me cum in her ass, she had overlooked the fact that I had been blessed with ridiculous stamina.
After another twenty minutes or so, I finally came, but not before she dropped her head a few times and I gave her a couple of welts on her gorgeous little bottom with my belt.