Amanda was always stopping in to the office unannounced. Not that I minded. I was a bit of a pushover for the girl. Whenever she wanted anything, however trivial, she could usually find a way to convince me to release the funds for it.

She could be a real brat. A sweet little brat, but a brat nonetheless.

There was a certain look that she would give me that always made me melt. No, not a pleading sort of look. A girl like Amanda didn't have to play for sympathy. It was a confident, cocky look that said unmistakably, ' you know I'm going to get my way, so don't even bother. '

I always ended up signing the check.

When I joined the law firm, just over a year ago, it was the first file they dumped on me. I was eager to please the partners, but this wasn't what I expected. I was itching to sink my teeth into some juicy bit of corporate law. Instead, what I got was a glorified baby-sitting job. Whether I liked it or not, my responsibility was to make sure that Amanda, and her little sister Cassy, got the money they needed. Or, in Amanda's case, a fair bit more than she needed.

No harm done, I figured. Amanda would be nineteen in a couple of years anyhow, and would be able to spend her share of the trust fund any way she wanted.

On this day, she was here to ask me to hire a new housekeeper.

"What happened to Maggie?"

"Oh, she left last night. I'm not sure why..." She was giving me a devilish little smile. I wouldn't get a straight answer from her. The brat!

It had happened the same way several times since I took over the file. Amanda would show up at the office unannounced, flirt for a while with some of the lawyers, and then come into my office to let me know that the housekeeper quit.

Amanda sat there silently while I called the agency. She was wearing a low cut summer dress which showed off her figure admirably. She was turning out to be a sexy girl, and she knew it. I tried not to stare, but she knew I was looking.

I begged with the woman at the agency. I pleaded. I groveled. No dice.

"Well, Amanda. It looks like you two are on your own until I can find someone."

There was a glint in her eyes.

"Whatever it is that you're planning, forget it, " I told her. " I'm going to come by every evening and make sure that you're behaving."

Even my strictest tone didn't seem to affect her.

"Now, Jason, what makes you think I was planning something?"

It was around eight o'clock when I pulled up the long driveway leading to the manor. My car was a piece of crap, and looked terribly out of place when I parked beside Amanda's corvette. Hell, I'd still be making student loan payments by the time Amanda turned nineteen and inherited her millions. It hardly seemed fair.

The lights were on in the house, but no one answered the door. I tried the handle. Locked.

It wasn't going to be that easy to get rid of me. I had my own set of keys.

This was my first time inside of the large manor. It was hard for me to imagine that the two young girls could live in this massive house alone, housekeeper or not. It just seemed, well, excessive.

"Hello, " I called out. No answer.

A quick tour of the lower floor confirmed that it was empty. When I returned to the front hallway, I thought that I heard a noise coming from upstairs. I climbed the grand staircase to the upstairs rooms.

The lights were only on in one room, at the other end of the hallway. As I walked down the hall, I looked in each other room briefly. All empty. There was only one room left. I stepped up to the doorway.

I couldn't believe what I saw next.

Cassy was laying face down on her bed. Her jeans and panties were pulled down to her knees, and she had a couple of pillows stacked under her pelvis, pushing her ass up into the air. Her hands were tied to the bed posts with a thin black rope, and her eyes were blindfolded. Something was stuffed in her mouth, and was held there by another length of the thin black rope tied around the back of her head.

I was mesmerized. Despite the fact that the girl was only fifteen years old, I couldn't take my eyes off of her. Like her sister, Cassy was a cute girl. Her firm little ass was a picture of perfection.

A quick glance around the room confirmed that no one else was around. This was too bizarre. Too sexy. My heart was pounding, and my cock was throbbing. Whatever Cassy was doing there, I shouldn't have been seeing it.

But here I was, and it was the sexiest thing I had ever seen.

Ever so quietly, I unzipped the front of my pants. She couldn't see me. No one

else was around. What harm could it do?

I began to stroke myself, my eyes locked on the beautifully displayed ass of the teenager. I had never looked at Cassy like that before. Amanda, yes, but not Cassy. She was still a little girl in a lot of ways. It felt so wrong to be standing there, stroking off while looking at her.

"Do you like them that young?"

My heart stopped. I froze in position. It was Amanda. She must have been hiding in one of the dark rooms of the hallway.

What could I say? I was standing in the door of her sister's room, jerking off.

"Shhh... " she whispered. " She still doesn't know that you're here."

Cassy still hadn't moved.

Amanda had that devilish little smile. She knew that I was caught in her trap.

"Keep on stroking, " she told me. Amanda had manipulated me before, but never so directly. I found myself following her command, and beginning to jerk myself off again. It was so embarrassing. My eyes returned, almost instinctively, to her little sister's ass.

"Cassy and I play these games sometimes. She really likes it when I spank her ass. Would you like to see me do it?"

Why was I going along with this?

I nodded my head.

Amanda went into the room, and sat on the edge of the bed. Cassy reacted by raising her ass, ever so slightly, for her sister. It was an incredible sight. Amanda was looking me straight in the eyes as she raised her hand and swatted her little sister's behind.

I was stroking furiously now, no longer caring about how I looked. Amanda stared at me, watching my cock twitch with excitement while she administered the spanking.

My knees almost buckled when I came. Rope after rope of my thick cum ran down my hand. I had to try hard not to make any noise as the orgasm ripped through me. Amanda watched the cum drip down my hand, with that smug ' I always get my way ' smile that she had perfected with me.

She rose from the bed, and walked over to me. She kissed me on the cheek, and whispered in my ear.

"I'll see you tomorrow night."

All day at the office, I couldn't get the image of Cassy out of my head.

She's only fifteen, I reprimanded myself silently.

It was wrong of me to lust after a girl that young, but the her little body was so very perfect. I wondered how far Amanda would go. Would she let me spank Cassy? My mind couldn't help but go a step further. Would she make Cassy suck me off? The thought of those cute little lips wrapped around my cock ... god, it made me shudder.

By five o'clock, I couldn't stand the anticipation. I had to see what Amanda had planned.

The door was locked again. I turned my key, and entered. The house was as empty as the previous evening. This time, I went directly up the stairs. I couldn't wait to see Cassy's little body again.

The hallway was the same. Which one of these rooms, I wondered, was Amanda hiding in. They were all dark except the one at the end of the hall.

I stepped into the doorway, and looked directly to the bed.

Nothing.

Well, not quite. The pillows were still there, stacked one on the other. There was a loop of the thin black rope tied to each of the bed posts. But there was no Cassy.

Instinctively, I knew what Amanda wanted. She wanted me to lay down on the bed, with my ass up. She wanted my hands in that loop of rope. Amanda wanted to spank me. She was probably in the next room, just waiting to see what I would do.

It was all too weird. With my heart in my throat, I began to unbuckle my belt. How on earth did she know that I would react this way?

I stepped forward and crawled onto the bed. I couldn't believe how horny this was making me. I wondered if Amanda would let me see Cassy again if I co-operated. With some slight hesitation, I dropped by pants to my knees and pulled down my boxers.

Face down on the bed, with my ass elevated, I felt so exposed. There was no room for modesty. I placed each of my hands through one of the loops of rope.

Silence. I couldn't see the doorway from my position on the bed. I had no way of knowing whether she was at the doorway, looking at me. I could imagine the devilish little grin that would cross her face, seeing me here like this.

Three more minutes of silence.

"Open your mouth, " she told me. I had no idea how she had come that close without me hearing.

I opened. She pushed a pair of panties into my mouth to gag me. I wondered if they were hers or Cassy's. Either one turned me on. Then she tied the black rope around my head to keep the panties in my mouth.

The blindfold came next.

Now I was exactly the way Cassy was when I first saw her through the doorway the previous night, and Amanda was sitting on the bed beside me. She must be loving this, I thought. I was totally submitting myself to her. But why wasn't she spanking me? What more did she want?

Then I remembered the way that Cassy had raised her ass, ever so slightly, just before Amanda began to spank her.

To my humiliation, I found myself doing the same thing. Ever so slightly, I pushed my ass further into the air for her. God, I was begging for it. My cock was so hard.

I heard a giggle from the doorway. Was that Cassy? Was she seeing me humiliate myself this way?

Amanda's hand came down on my rear.

"You'll come back tomorrow night, " Amanda said. Her hand came down again. " We'll make just a little bit of progress every night."

I stuck my ass up for more.

The next day at the office, I swore that I wouldn't go back to Amanda, but some part of me knew that I would. It was just so degrading. Here I was, a bright young lawyer in a prestigious law firm, and I was learning, each night, to take orders from a teenager. I was like a new toy for her.

I didn't delay this time. Amanda told me to take off all of my clothes and assume the position. After I was down, she punished my ass with a paddle. The pain was more intense than before, but still bearable. She pounded my ass for a good fifteen minutes, on and off.

"Mmm, your cheeks are nice and red. I'm going to take you for a little walk. Your ass will look so nice when you crawl for me."

Amanda untied my hands from the bed posts, and took off my blindfold. Around my neck, she snapped on a dog collar, and a little leash.