The summer after my sixteenth birthday was one I would always remember. It was Tuesday night, my best friend was over, and after our usual hangout of watching tv and wrestling, his mom had finally come to pick him up. We were both on the school wrestling team and liked to wrestle as much as possible for fun.

A bit after he left I heard my mom call from downstairs that dinner would be ready soon. 

I shouted back, "Ok mom."

I continued to stare at the tv, enjoying the wrestling match that was playing. I was so completely zoned in that when my mom started talking to me from right beside me, I jumped.

"Oh, honey, I didn't mean to scare you, but dinner's ready. Please get dressed and come down," She said, smiling.

"Can I finish watching the match?" I asked her. 

Wearing only grey boxers, I wasn't even dressed for dinner and was all too comfortable sitting in front of the tv. I was going to persuade her how important it was for me to learn techniques from this match, but as soon as I looked up at her, I lost my voice. My mother was always one to keep in shape, and took great care of herself. But somehow until this point, I had never really paid attention to how good she actually looked.

She was wearing a sports bra that could barely contain the roundest and biggest set of boobs I'd ever seen and black yoga pants that hugged an ass that could rival Kim Kardashian's. I was only just figuring out what getting hard meant and what cum was and had no real experience other than a wet dream or two.

But still, I stared a good couple of seconds in awe until she finally spoke saying, "I'll tell you what. If you manage to pin me for thirty seconds, you can have your dinner here in front of the tv, but if I pin you for thirty seconds, then we go straight to dinner downstairs..."

"Deal!" I answered, laughing and overly confident.

Although I was only sixteen, I had grown considerably that last year. I wasn't close to my mom's height yet, but felt like she would surely be an easy win.

We got into position facing each other, and my mom reminded me of the rules again:

"Remember, the pin has to be a whole thirty seconds, and when I win, make sure to put on some pants and a shirt before coming down to dinner," she said with a sinister smile

Laughing I said, "Sure mom, whatever you want."

And with that, we started wrestling. Very quickly we were both on the carpeted ground, rolling and squirming for a couple of minutes, neither one of us getting ahead. Finally, I made a mistake that would cost me the match. I thought I could roll onto my back and just when she was about to put her weight on me, flip her onto her back and hold her the thirty seconds... What actually happened was that as soon as I got onto my back she swung her legs to either side of me, sitting on my crotch, and also used her hands to pin both my hands to the side.

We were both panting and sweating from the effort of the last few minutes, but I wasn't about to give up without a fight. I started squirming trying to get out from under her when suddenly all the fight in me stopped. I stared dumbstruck at the huge pair of boobies swinging above me, barely contained by her sports bra, like two golden globes shining from sweat.

She laughed, saying, "You know what this was easy! I'll even give you a full minute to try to get up before you lose!"

As much as I tried I couldn't get her off me, squirming under her, and not managing to stare away from the big pair of boobs bouncing above me. Very quickly things took a turn, her boobs did something I never thought was possible, and in an instant, I was rock hard because of my own mother... This was the first time I've ever gotten hard other than from dreams.

"Mom you're stronger than I thought!" I said.

I tried to get up, and couldn't help feeling her squirming above me, trying to use her weight to hold me down, this caused her big ass cheeks to really sink down around my dick. 

"I am gonna win this baby, you might as well give up," she answered me, smiling.

I could tell she felt my dick as she was getting a little red in the face, but if anything this caused her to grind down harder, leaving me no chance to push her off.

I started to feel really good, my dick throbbing, and instead of pushing her up and off, I kinda helped her grind backwards and forward along my dick, her ass cheeks squeezing my dick between them and her big boobies bouncing in front of my face.

"Mom, I think I need to go to the bathroom so please let me up," I said in desperation.

Getting flustered myself, I felt like something wrong was gonna happen if we didn't stop, but couldn't help to enjoy what was going on. She let go of my hands telling me to push her off and go relieve myself, while still grinding back and forth in a world of her own. By unpinning my hands with her own she moved her hands to either side of me, which gave her the leverage to keep grinding back and forth on my dick with even more force. Doing this, unknowingly to her, caused her sports bra to strain to its limit, her big boobies all but fell out, her hard nipples being the only thing stopping them from popping out entirely.

I couldn't take it anymore. Fighting a losing battle I gave in. I started matching her grinding motion, allowing my dick to sink even deeper better those big ass cheeks, and helping her glide back and forth from my balls to the head of my dick, her ass cheeks sandwiching my dick between them the whole way. I also lost all pretense and just stared point-blank at her big boobs.

After a few moments, she realized I hadn't pushed her off yet, and asked me, "Baby, aren't you going to go to the bathroom?"

"I don't think I'm gonna make it mom," I answered, not dropping my gaze from those huge bouncing boobies.

She finally looked down, noticing my eyes, transfixed to her boobs.

Without missing a beat she gave in to her own lust, grinding ever harder on my dick, really squishing it between her big ass cheeks. And at the same time started talking to me the way no mother should.

"It's ok, baby, mommy will help you, just look at mommy's big boobies."

 I answered straining, "Mom, I really need to pee, but it feels so good!"

"It's okay my darling boy, focus on mom's big boobies and let it all out! Shoot for mommy! Show mommy how much her son can shoot for her big boobies!"

I lost it, hearing her talk like that drove me over the edge. I started erupting in my underwear, shooting rope after rope of cum, each one bigger than the one before. All the while her ass cheeks were milking my dick for all its worth. And her boobs were bouncing above me, causing me to continue shooting for what felt like an eternity. 

With each shot of cum I couldn't help grunting and moaning, "Oh momma! Mommy boobies! So big!"

This continued for quite a while.

Finally, I let out the last spurt of cum I had, still looking at those big boobs above me. Every last drop was out of my balls and into my underwear. Exhausted, I fell limp, and my mother finally got off me, surveying the mess in my underwear which was completely soaked, bulging in the front with what can only be a liter of cum.

My mom, red in the face, quickly said, "Take your time getting ready for dinner, baby, I think we both need a shower." And she left the room.