Finding a good babysitter is hard. My wife and I are very picky and a little paranoid, but we would go crazy if we didn't have a chance to go out together just the two of us. So when we found Mary, we thought we found the perfect angel to watch over our son. Well, yes and no.

Mary was 21, only about 5'2" or so. She was fairly thin, and pretty much always wore outfits that were tight on her and showed off her figure. She had long, straight brown hair and usually kept it in a high ponytail when she came over to sit for us.

Like I said, we're sort of paranoid, so we put a camera in the bookshelf in the living room just to make sure everything stayed above board. And the morning after we would go on a date, I'd fast-forward through the footage just to check that everything was above board. And for a good six months, it was. She was really great with our son. She'd play games with him, they'd stream a kids show - and she would laugh along with him. Then right when she was supposed to, she'd disappear from view with him for a few minutes while she put him to bed, then she'd reappear, sit down and watch a show on TV or read or play with her phone, or whatever until we got home.

And everything would have been perfect, until it wasn't. I sat down to review the footage from the night before, fast-forwarding through what I expected to be another perfectly ordinary night... but after she put our son to bed, she sat down with her phone for a few minutes. Then she stood up, went to the door and let someone in. As she returned to the couch with him, I could see that her visitor was a young man, probably a student like her.

What the fuck? She had to know this was unacceptable. My mind was filled with a mix of anger at her transgression and annoyance that we were probably going to have to fire her and find someone new. Even so, I decided to watch the rest of the video to make sure there was nothing worse.

They got to the front of the couch, and he turned her around and took her into his arms, and they started kissing. She wrapped her arms around him, and he moved his hands down to grab her ass. Then he spun her around and started kissing her neck while his hands dove under her shirt to paw at her breasts.

As I watched, transfixed by the video, he pulled her shirt up over her head and tossed it aside, then reached behind her for the catches on her bra. When it came off, my jaw dropped. Her breasts were the perfect size, and naturally perky (ah, to be young). I was suddenly jealous of the young man who was thumbing her nipples while she tossed her head to the side and moaned.

Suddenly, she spun around and dropped to her knees and worked to free the young man's cock from his pants. Once she succeeded, she wasted no time in taking him completely into her mouth and bobbing her head while his hands tangled in her hair.

As I watched her suck her beau's cock, the anger and jealousy faded into the background, and my cock started to twitch.

She stood up, shucked down her pants and panties, and knelt on the couch, sticking her ass out, and he quickly entered her from behind and started fucking her quickly. As he did, he started smacking her ass.

Before long, he suddenly stopped thrusting, and I could see him stiffen up, and then she pushed herself back and then shook in her own orgasm.

He pulled out, and they sat next to each other on our couch and wrapped each other in their arms and kissed. I suddenly realized with a wry grin I would need to check to see if there were any new stains on that part of the couch.

They didn't stay that way too long before she stood up and urged him to get his pants while she re-dressed herself. Once they were put back together, she kissed him, and urged him none too gently towards the door with a laugh. Once he was gone, she returned to the couch and her phone, and we got home about an hour after that.

I sat back to think about... everything. Our son really liked Mary, and they clearly had fun together. Trying to find someone like her was going to be an awful chore. And our son would be heartbroken that he wouldn't get to see her again. But I couldn't just let this go - bringing a stranger into our house was just completely unacceptable.

I walked into the kitchen to find my wife.

"Honey, we need to talk. It's about Mary."

Her face showed concern, and she joined me at the kitchen table. I continued, "You know the camera in the living room? Well, she brought a boy over while we were gone last night."

Her eyes flew wide, and then narrowed, "Damnit! What happened? What did they do?"

"Well, they made out. They didn't do anything to the house or steal anything, and it was after bedtime, so no real harm done."

Her face softened. "Well, that's something... But bringing someone into our house... That's just not acceptable."

I shook my head. "No. And it's a shame, because we got so lucky to find her - she's good with our son, and she's always available."

"God. You're right. We have to fire her, but we can't fire her. What are we going to do?"

I thought about it for a minute. I really didn't want to fire her, but we couldn't let this go. If she was going to stay on with us, she'd have to make amends for this, somehow.

A rogue thought entered my brain - I remembered her boyfriend fucking her... and smacking her ass while he did it. Yes. She'd either agree to a good old-fashioned spanking or be fired.

"Leave it to me, I'll get her to understand how seriously we take this and get some sort of concession out of her. But I don't want our son to hear any of this, so would you take him to the park so we can hash this out?"

She nodded. "Sure. I know you'll make sure this won't happen again," she said, and then stood up, gave me a kiss, and went back to fixing lunch.

Later that afternoon I texted Mary, "We need to talk. Can you come over here Saturday afternoon at 3?" That would give her a couple of days to stew. Maybe she'd have an idea what this was about, or maybe not.

I saw the speech bubbles appear on my phone... then stop. A minute went by, and they came back, followed by, "Sure. No problem. See you then."

Saturday, around 2:30, my wife gathered my son and took him to the park. I had the video on my computer in my den. I brought in a kitchen chair for her... and waited.

She was on time, and I welcomed her in. It was summertime, and she was dressed for it - a T-shirt and shorts. I led her into my study and pointed her to the chair, and she sat.

"Mary, this is pretty serious. I'm not going to beat around the bush. Watch this."

I turned to the computer and pressed play. The image of the empty living room came up on the screen. Shortly after that, she led her boyfriend to the front of the couch, and they started canoodling. As she saw that, her eyes flew wide and her face blanched. I stopped the video and turned to face her.

"I'm deeply, deeply disappointed in you, Mary. Do you honestly think it was acceptable to bring a stranger into our house while we were gone?"

She looked down at her feet. She clearly knew she was caught, and the guilt was written all over her face. Her voice let out a quiet "No."

"What's that, Mary? I didn't hear you."

She looked up at me, and I could see her eyes glisten a little. "No, sir."

"What am I supposed to do about this, Mary? We can't trust you now, can we? Our son really likes his evenings with you, and we really were at ease leaving him with you. And now we have to throw all that away?"

"Oh please, give me another chance. I've been going with Tom for a while now, and I... well... I wanted to..."

I interrupted her, "You wanted him to fuck you on our couch?"

She bit her lip and looked back down at her shoes.

I sighed, "Mary, I don't want to fire you. But if you're going to keep sitting for us, there are going to be consequences."

She looked back up into my face. The guilt changed ever so slightly into fear.

I continued, "I'm going to give you a no-nonsense, bare-bottom spanking. If you accept that, then we'll put this whole messy business behind us. If not, then it's goodbye."

Her eyes flew wide, and I could see her tremble a little. I stared at her, unmoving for a long moment. Then I saw her swallow and her head nodded ever so slightly.

"Stand up, Mary."

She slowly got to her feet. I brushed past her and sat down in the chair she vacated. She turned towards me, and I reached to her waist and unsnapped and unzipped her shorts and tugged them down to her knees. She had on a white pair of bikini panties and held her hands tentatively in front of her crotch. I grabbed her elbow and dragged her over to my right side and tugged her down over my lap. She landed on my thighs and grabbed at the legs of the chair to steady herself. I took hold of her waist with my left arm and rested my hand on her panty-clad bottom.

"This is going to hurt, Mary. It's going to hurt quite a bit. You can stop any time and walk away, but if you're really sorry for what you did and want to stay on with us, you'll take your punishment like a good girl. Now, are you ready?"

She gave a plaintive, unsteady "Yes, sir."

I brought my hand away, and then sharply down across the middle of her bottom for the first one. The sound of the impact was followed almost immediately by her voice making an "oof" noise. I didn't hesitate for a second before giving her another and starting a brisk cadence of punishment.

For her part, Mary's voice was non-stop wordless reactions, one after another. Her feet kicked continuously in reaction to the hot fire I was kindling under her panties. I paused after too many swats to count and took hold of the waistband of her panties and tugged them down to mid-thigh. She gave a loud moan as I brought her bare bottom into view, already pink on both cheeks. As I resumed her spanking, her voice changed into a solid keening whine and, before too long, into open sobbing. I spread the spanks all across the entirety of her bottom, from the very top of the crack past her "sit spots" and just to the tops of her thighs. I finished her up with a half dozen very hard swats on each sit-spot and then ordered her to stand.

She got to her feet, and her hands flew behind her as she danced in place, tears still flowing down her face. I got a good look at her crotch while I tried to soothe the fire in her bottom. Her pubic hair was thin and wispy, trimmed into a neat triangle that ended just above her notch. I found it ironic that the modesty she showed going over my knee was well and truly forgotten now, certainly.

I waited for her to calm down a little and then stood up.

"We're not quite done yet, Mary. You're going to take a dozen from my belt, and then we'll be finished." I stood aside and gestured back to the chair. "Stand here, Mary, and put your elbows on the seat of the chair."

She took a tentative step to the front of the chair and bent over as I directed.

"Move your feet a little bit further apart."

She obeyed, walking them as far apart as the pants still at her knees allowed. I undid my belt and pulled it out of my pants, taking the buckle in my hand and wrapping most of its length around, leaving the last two feet as a makeshift strap. I stepped to the side, and then tapped her ass with the belt to test the distance.

Without another word, I reared back and let loose with the first stroke, right across the center of her ass. As the belt fell away, I could see the red stripe it left behind. Almost immediately, a high-pitched squeal left her mouth, and as it tailed off, she dissolved again into hard crying. I continued to methodically work the belt up to the top of her ass-crack and then back down.

When I had dispensed the dozen I promised her, I stepped back behind her to examine my handiwork and re-thread my belt on my pants while she cried with heaving sobs. Her bottom was criss-crossed with angry welts left by the belt. She would surely be feeling her punishment for at least a few days.

"Alright, Mary. Your punishment is complete."

She stood up, turned around, and threw herself at me and pressed her face into my chest and wrapped her arms around my back. Through her crying, she repeated, "I'm sorry, I'm sorry..."

I brought my hands around her back gently and spoke to her in as gentle a voice as I could muster, "It's ok, Mary. You took your punishment, and it's all over. It'll be like this never happened. You're never going to bring anyone into our house again without permission, are you?"

"Oh no, sir, no, never. I promise!"

"Good girl. Now, put yourself back together again, and you can wash your face in our bathroom if you like."

She let go of me and blushed as she reached down to pull up her panties. She winced as she brought her shorts up past her hips and buttoned and zipped them. Then she wiped her eyes and turned and went out into the hall and into the bathroom.

I heard the water in the sink run briefly, and then I heard her blow her nose. She came back out, and the tears were gone, but I could still see her eyes were a little red. She smiled, though, walked back up to me and gave me another hug, got up on her tiptoes, and kissed me on the cheek.

I smiled. "Promise me you'll be a good girl from now on, Mary."

She blushed and said, "Yes, sir," and turned towards the door.

After she was gone, I returned to the study and sat down. The scene of her kissing her boyfriend was still frozen on the computer screen. The lizard part of my brain scrubbed the cursor forward just a bit and landed on her standing facing the camera with her bare breasts exposed, her head tipped back, and her eyes closed. I smiled for half a second, then closed the window.

My thoughts moved back to my wife, and that earthy lust redirected itself seamlessly, and I thought of her breasts and imagined her in that same pose. But in my own head, the scene wasn't frozen... Instead, it was followed by me taking her by the forearm and dragging her naked body over my knee and giving her the same spanking I had just given Mary - hearing her cry and watching her bottom turn red under my firm hand.

And I realized that I wanted nothing more in the world than to find some way to make that happen.