Grow your cock between her tits

You remove one of your hands from your mother's neck and slide it down her spine. She moans in your mouth and sucks your tongue as you tickle her back. You groan in pleasure as well, trying to mask the sound of what you're about to do. In between strokes of her spine, you snap your fingers as quietly as possible.

*snap*

Your cock head bravely surges upward into your mother's cavernous cleavage. Bouncing titties buffet it from all sides as she continues stroking your shaft below the giant balloons. The growing shaft is causing her hand to rise up closer to her huge tits and slap against them harder with each passing second, but she doesn't seem to notice. She's either unaware of your plan because of all the hot commotion, or she's doing a fine job of playing along. Her tits ripple against your chest with each impact of her jerking fist. You stroke up your mom's spine and tickle the base of her neck just below the hairline. She moans again in appreciation as you lift your hand to reset on her spine.

*snap snap*

Your bloated mushroom tip pushes deeper into the soft squishy boobmass, with expanding shaft following suit. Your mom's hand rises even higher towards her breasts, and her fingers splay wider from your increasing girth. Her fingers can no longer fit around even half the girth of your meat. She unconsciously adds the hand that was previously fondling your balls to your shaft, and continues jerking you off with both hands forming a ring around your cock. Your big growing rod continues to part her ginormous boobies. You feel her breasts being pressured to shift wider on your chest as your cock tries to spread your mom's tits, but they remain snugly in place on account of her tight embrace. Your mom's massive bouncing breasts tightly wrapped around your growing cock is turning you on so much. You need more length, more pressure!

*snap snap snap snap snap!*

This time you don't even try to hide your horny plan, and click loudly without masking the sound. Your mother's eyes flutter open and look into yours as she retreats her tongue from your mouth. She smiles lustfully at you while biting your lip. She jerks your expanding cock faster as it surges upwards between her massive tits. You struggle not to bust as your dick strains against the supple boobflesh. You can feel the veins in your cock pulse, enveloped on all sides by your mom's soft tits. You feel the pressure on the tip of your fat cock decreasing, and it finally surges up and out of your mom's cleavage into the cool open air.

Your mom removes her hands from your cock and grabs your own hands in hers. Still passionately kissing your lips, she forces you to *rub* both of your index and thumbs together on both hands, three times each.

*rub rub rub*
*rub rub rub*

“Oh lord,” you think to yourself, wondering if the rubbing will have counted as snapping your fingers.

You don't have to wait long to find out as your penis practically explodes with growth. Your mom guides your hands below her rack, to where she was just stroking your pole, and wraps your hands around it. You dutifully jerk yourself as you swell higher out of her cleavage. Your fists bash into your mom's underboob and bounce her softy titties against your chest. Your mother uses her freed hands to stimulate the cock head that now pokes out of her cleavage. She dances her fingers around the rim of your helmet as it grows, sending tingles of pleasure shooting through your dick. Your mom switches to vigorously stroking your cock shaft as it rises out of her titty canyon. In no time at all, your mother is imitating the motions of jerking an average sized cock above her huge melons. Soon all of the available space between your mom's cleavage and jaw is occupied by your swelling meat. Your massive spongy head pokes angrily into her chin and tilts her head upwards, forcing the two of you to break your kiss and acknowledge the massive totem pole.

You both pause your jerking and stare down at your humungous rod in amazement. It stands rigid, proudly wedged between your mom's gigantic boobies. You tense your cock a few times, causing it visibly pulse and struggle against your mom's tits. Your mom angles her head down and kisses the tip of your cock sensually, looking up into your eyes as she does so.

“Naughty boy.. what are you going to do with all this cock?” she asks, keeping her mouth close to your bloated head.

She swirls her tounge around the rim of your tip as she waits for your response.