Make her ass bigger

Your mom kneels on your bed beside your waist. Her unrealistically large breasts are thrust out prominently as she reaches back to tie her hair into a ponytail. With hair neatly fastened, she hungrily launches herself at your enormous cock, grabbing it with both hands. You grunt lustily at her rough touch. Lisa begins jerking your huge shaft. Her massive tits bounce arousingly in the same rhythm.

Dropping all inhibitions, she leans in and kisses the tip of your inflated cock. Her warm breath on your tip is electrifying, and you involuntarily thrust your hips up, smushing your giant cock into her lips. Your left leg presses against your mother's jumbo jugs as your dick rubs against her mouth. She takes the hint and stuffs as much of the bloated head into her mouth as she can, but she only manages to greedily slurp over 3/4 of its surface. You groan and curse, wracked with pleasure by her wet warm mouth.

"Fuck darling, this huuge dick is so hot," your mom agrees excitedly, "I just wish I could fit it all in me."

"Well I wish you got your wish," you moan.

Your mom smiles at you knowingly. This time, when she wraps her maw around your gut shovel, the whole head inexplicably slides into her mouth and disappears into her warm throat. Animalistic lust takes over and you grab the back of your mother's head to **** it lower onto your enormous pole. There is some resistance, but she makes it all the way to the base of your cock. She halts at the bottom of your immense length and fondles your softball sized nuts. You release your mom's head and she bobs it up and down at the bottom of your cock. You admire the way the side of her throat bulges as your huge cock slides around inside her.

As your mom continues to impale herself on your huge cock, you trace your eyes over her gigantic breasts, slim waist and shapely posterior. Her wide, motherly hips have remained toned and appealing thanks to her strict gym routine, but it pales in comparison to the size of her huge tits. You think she's in need of a little balancing out.

"Mom I wish your ass would get say, twice as big.. and that you'd notice and enjoy it growing" you say.

Lisa's butt begins steadily expanding. She moans on your cock, pausing her blowjob for a moment as she's overtaken by the pleasurable sensation. Your mom reaches back behind herself and gropes her butt as it inflates larger. Her fishnet stockings morph as she grows, magically maintaining their fit around her swelling ass. Her round butt cheeks quickly reach the size of bowling balls before the growth comes to a halt. Unfortunately you're having some trouble getting the full picture from your sidewards angle.

"Mom I wish you'd stand up and show off your ass for me," you command.

Your mother complies, standing at the foot of the bed facing away from you. She giggles and rocks up and down on the balls of her feet, causing her ass to bounce enticingly. The perfectly round fat cheeks are a sight to behold, but you want more out of her.

"I wish your ass was wider and more motherly," you say, almost to yourself.

As she bounces on her heels, your mom's hips widen drastically into **** hourglass shape.

"..and I wish it protruded enough to use as a shelf," you add.

Her butt expands again, this time directly towards you.

"Oh fuck honey that feels fantastic!" she exclaims, roughly digging her fingers into the expanding flesh.

You swallow as your mom wiggles her swelling butt with delight. Even from behind her back, you can see the sides of her massive tits wobbling around in front of her. Her huge badonk keeps growing towards you until you could definitely balance a glass on her rear without any trouble.

"Don't you wish your meat was between these buns darling?" your mom teases, wobbling her fat cheeks with her hands.

"Fuck yes," you agree eagerly.