As I got out of my car my skirt rode up, showing off my shapely legs, which I'm told are my best feature. I quickly smoothed my skirt back down, thankful that I was in my driveway and not in the parking lot at work. Stupid skirt, I thought. Still, I'm pretty sure it had earned me a couple of raises over the years, so I continued to wear it regularly.

I guess I was pretty quiet getting into the house. Neither of my girls was in the living room so I took off my shoes and went upstairs.

Then I heard it: a grunt from Laurel's room, and not from her. Bed springs squeaking. She wouldn't...

I softly opened the door of my 17-year old daughter's bedroom to find her boyfriend Pauly between her thighs, plowing her good as she lay back on the bed, a look of joy on her face.

"LAUREL JANE!" I yelled. I always used the girls' first and middle names when they did something wrong. They knew I meant business then.

Pauly quickly pulled out, making Laurel gasp loudly at the sudden evacuation. Stupid boy, I thought. You just don't do that!

He rolled to the side and dropped to the floor on the far side of the bed to mask his nakedness. Too late; I had seen his sizeable condom-covered prick. Well, at least they were being safe, I mused.

Laurel crossed her legs and arms to cover her nudity, looking indignant ... well, as indignant as a naked teenager can look. "Mother! You can't just come into my room!" she yelled.

"The Hell I can't, missy! You know what I've said about sex!" I retorted.

She looked confused. "Um..."

I continued, "I SAID don't have sex unless you're ready to be a mother. Well, are you?"

"We're using a rubber..." she responded.

I moved forward, to the foot of the bed. "Those aren't 100% effective and you know it. You probably didn't even put it on right. Pauly, come here." I beckoned.

His name is Paul but I call him Pauly, like Pauly Shore, because of his brown curly hair. I think he's too young to get the joke, but I keep making it anyway.

He didn't move, looking fearfully to Laurel and then back to me.

"MO-therrr..." Laurel whined.

"NOW!" I yelled. Pauly jumped up, his cock pointing at me.

To his credit he hadn't softened much. I spotted the problem right away, and reached forward, squishing the air-filled tip as I sat on the bed.

"Look at this," I said, "you're supposed to squeeze the air out of the end when you put the condom on. Without that the extra pressure produced when he cums might blow it right out, and then it's Baby City."

Pauly's cock had returned to full hardness, my fingers lightly brushing the head as I squished the end of the condom to illustrate my point. My talk of babies might have had an effect too.

I felt moisture between my legs and realized I was now quite turned on by this situation. Pauly was looking at me now, not my daughter. His eyes roamed my full blouse and shapely legs, and I realized my skirt had ridden up again, giving him a good look at my creamy thighs. Laurel's legs were skinny and not as shapely as mine, and her boobs, while nice, weren't the bazoombas I had developed after she had been in my belly 17 years ago.

I had been a year younger than Laurel when I had made a stupid mistake and had unprotected sex with my boyfriend at the time, her father. He quickly left town when I started to swell up. Another error in judgment a year or so after Laurel was born left me with a second daughter and another absentee father. I didn't want my girls to make my mistakes, so I drilled into them, "Don't have sex until you're ready to be a mother!" I was quite plain and direct with them about it, and here she was, taking a chance.

There had to be a punishment for this. I told her...

I pulled the condom off of Pauly's dick with a snap.

"Mom!" Laurel complained.

I shut her up with a look, re-rolled the condom and lined it back up with Pauly's cock head. I secretly nipped the end between my thumb and index fingernails, and then squished that end as I rolled it back down Pauly's cock. I figured his dick was a little above 7" in size. Neither of my baby daddies had had one bigger than 6", so I was a little extra careful getting the rubber on just right, sliding my fingers along his length to smooth out the prophylactic.

When I was done I stood up and went over to a chair along the wall. Sitting, I faced them, my legs crossed at the knees. "Start again," I said.

"MOM!" Laurel cried out.

I lifted my finger. "Laurel Jane, I may have just kept you from getting pregnant, so show a little gratitude." The girl pouted. I continued, "Now, I want to see some safe sex so I know you can be trusted."

Laurel sat up, her arms still crossed over her bosom. "I'm not going to," she pouted. Pauly had been surprised by this turn of events but still seemed ready to go.

I crossed my arms as well. "Then I guess you can say goodbye to your phone, your laptop, your Playstation. These are things that a responsible teenager has, not some mewling child."

Laurel was shocked and looked ready to cry. "But Mooom..."

I raised my eyebrow. She stopped.

I continued, "Now ... how did this start? Show me."

Pauly laid Laurel back, moving his hands to her breasts, massaging them. She started to push him away, but then she looked at my determined stare and lowered her arms.

Laurel started to heat up under the boy's ministrations. He seemed pretty capable with his hands, and soon his fingers were in her pussy. She gasped.

Pauly spoke up, looking back at me: "Uh, she pushed me back and got on top."

I nodded. He rolled to the side, his cock pointing upward. Laurel gave me a look and climbed onto his lap, making sure to turn her back to me as she did so. She grasped his member and swept his cock head along her pussy lips until it was lubricated, and then started to sink down on it.

My pussy felt like it was on fire. I wanted to play with it but Pauly kept looking from me to Laurel and then back to me as she adjusted herself, lifting up to get a bit more lubrication on his dick before sinking down on it further. I heard a "Mmm..." from her as she bottomed out on his cock.

She ground her crotch on his a bit and then lifted up halfway before settling down again. After a few more times they started to pick up speed.

I was thinking about the tip of the condom I had possibly compromised. I figured I had actually put a tiny hole in it, but was it bigger than that? Why had I thought that was a good idea? Oh, my pussy was throbbing!

Oh, of course, I thought: I was ovulating! I always got horny and thinking about making babies at that time of the month. I also remembered that my daughters and I had synchronized our cycles, which meant that Laurel was fertile as well!

Oh fuck! I thought. I knew I should stop them, but it was the hottest thing I had ever seen ... I would let them rut and decide in a bit.

Suddenly, Pauly grabbed Laurel and rolled to the side, coming up on top of her. This was the position I had walked in on. He started to pump my eldest daughter faster, grunting.

Laurel, while enjoying herself, wasn't orgasming. The few times I had had sex I had cum like crazy. Maybe we just weren't built the same ... or maybe my presence was turning her off.

And then something changed. There was a sudden "Oh!" from Laurel and Pauly huffed like a bull, his thrusting increasing dramatically. Was he cumming?

Laurel tried speaking: "Paul! I think ... unhh ... the con ... dom ... ohh..."

I held my breath. The condom had...

" ... bro ... ohh ... OH GOD!"

... broken! Laurel seemed overwhelmed by the sudden more pleasurable sensation of skin on skin, without the deadening protective sheathe. She was unable to vocalize properly as Pauly rammed into her, harder and faster.

I couldn't take it anymore! I raised my skirt and yanked my panties down for easy access to my sopping pussy as I watched my eldest daughter having the first unprotected sex of her life.

That was why I had gotten pregnant both times: the feel of sex without a condom was too pleasurable. Once you did it bareback you didn't want to do it with a desensitizing rubber! And without that protection there was nothing to prevent that baby batter from bubbling up inside you and baking a baby cake.