"Grow them until I say stop mum"

“Grow them until I say stop, and we’ll see if my dick grows with them…” You say.

Your Mother repositions herself between your legs so her breasts where resting on either side of your flaccid but still glorious tool.

"I can't wait to watch that massive cock grow for me. Watch mommy's breasts grow for you, John"

You watch in amazement as her breasts started slowly expanding… and expanding. Like they where filling up with water from the inside. You can feel your mother's warm luscious tits slowly pushing across your abdomen as they push up and away from her slim frame. Your cock springs to attention and you moan;

"Mom, this is turning me on so much"

She smiles victoriously and replies

"I know baby, I can see your cock is even bigger than last time…"

You look down and note that it is true; your dick had put on 2" since you last came. You can feel your balls swelling, growing larger and pulsing with cum. You return your eyes to your mother cleavage and moan in desire; her tits are still growing and bulging. The weight of them is very noticeable now on your stomach. Your rock hard cock remains pointing straight up now, getting enveloped by the onslaught of her sweet breast flesh. They must be at least the size of cantaloupes.

"Now, Baby?" she asked.

"No, mom! Grow bigger, mom, bigger." You reply impatiently, the feelings boiling up inside of you can't wait:

Unable to hold back any longer you start fucking your mother’s bulging melons franticly as they expand. Your dick was still growing and seemed too big for her tits but you don't care. The top of your cock sticks out of her cleavage several centimeters.

"Grow faster, mommy, faster!" you cry to her. After hearing you say this she smiles and squints her eyes in effort. You feel her tits get very warm about your thrusting cock as though someone has poured warm water into them. Then they start pushing outward and upward with every thrust you make.

"Oooh John… as my breasts grow… they feel amazing! So Sensitive with… each change… Every time you go up and down… ahhhh… every inch of my tits feels like heaven! Ohhhh fuck! Ahhhhh, don't stop, they are so sensitive."

Pre-cum leaks out of your massive cock, lubing the area perfectly as you fuck her enormous juggs. You try and grab her tits as you pump yourself between them and can feel them push against your hands as they expand. You keep having to change your hold on them as she grows and grows. She’s now big enough that only an inch of your manhood protrudes from within her cleavage. The pressure between her massive cleavage felt like ecstasy wrapped about your pulsated cock.

"Bigger, bigger, bigger, bigger, mommy, bigger!" you cry uncontrollably as slam yourself repeatedly between her breasts "You are so fucking good, I'm want you bigger!"

At this, your mother moans as her body shakes in a powerful orgasm. Twitching violently while cum leaks out of her pussy and milk drips out of her nipples. This didn't stop you though, you still need to cum for her. Her tits easily dwarf even the largest watermelons and your head swims, you’re in paradise. Every stroke in between her tits is better than the last.

"I'll grow even bigger if you cum for me, John. Cum for mommy, that's right. Your cock is so huge for mommy. Give me that cum." She gasps with a clouded look in her eyes.

Your cock disappears inside her cleavage. Even with the size of it, it is lost in your mother's loving breast-embrace. She pushes her tits together harder now to enhance the sensation for you. The change in the feel of it makes your body quake, and you are spurned on with the last of your maddened energy. The resistance of her tits up and down the full length of you colossal cock fires every single pleasure nerve in your body. Every time you push into her cleavage you feel the push against the pressure of her hands and the next wave of breast growth; growing rhythmically with each frantic thrust into them. Knowing this maddens your lust to a climactic frenzy, bucking your hips and throwing your weight into each **** thrust between her incredible tits. So much that you now feel your balls stretching and growing to compensate for more hot cum to match the crazed rutting in intensity.

"I'm going to cum mommy, i'm going to cum. Grow, for your baby, grow bigger NOW, bigger, BIGGER"

Right before your orgasm, your cock, ready to unload, grows even bigger with each final thrust. Her expanding tits can't keep up with how fast your cock lengthens and thickens. She feels it's hot pulsing length pushing higher and higher within her tits until it pokes out from her massive cleavage. It’s too much for both of you. You both climax simultaneously! You feel each wave of your orgasm dump load after load of cum all over your mother's face. She tries to scream in pleasure but all that comes out is a gurgling sound as your cum sprays relentlessly into her mouth. She swallows and swallows repeatedly, all the while fighting to control her body which racked with one orgasm after another. Your balls slowly deflate as each body-twitching wave of pleasure launches more and more cum. You think that your balls must have an organ like a heart that pumps cum instead of blood. Each burst an orgasm in itself. Your orgasm lasts over a full minute leaving you trembling on the bed with your mother panting with her head rested on your knee.

You look down. Both the size of her cleavage and the length and girth of your cock is mind boggling. Control of the situation was obviously lost as you served some sub-conscious fantasy but what now?