As she sat on the bed, contemplating her lovely (but still too small for the g-cup) breasts, she found herself getting hard again. At its new size, she was both surprised to find that she had enough blood to stay conscious, and happy that there was some flex in her erection so she could bend the head around towards her face. She had loved the taste of her own cum, and well, if she was going to get hard at the drop of a hat, it was nice if she could still bring herself off.
As she slowly licked the huge head, just barely able to fit it in her mouth - she found herself starting to really get excited. She started leaking pre-cum as her balls started churning. Licking the delicious and slippery pre, she noticed her breasts start to tingle a little. Pushing that thought aside as not unusual given how turned on she was, she continued to lick and suck, and jack her huge cock into her own mouth. With a pop, the slippery head fit completely in her mouth and she started to jack and suck in earnest, her breasts tingling more and more as she worked the pre out of the dime sized slit.
Reaching one hand down to grope her new d-cups, she thought maybe it felt even a bit bigger, and heavier than it had just moments before. The thought of being bigger sent her over the edge, and she moaned into her own cock as her orgasm began. She could feel the cum churning out of her balls, and up through every delicious inch of her huge cock, spurring her to greater heights of pleasure. Her breasts were tingling madly, the nipples pressing hard into the oversized cups - was that new? She couldn't remember. Suddenly her mouth was flooded with her cum and she started to swallow it down as fast as she could - her lips sealed by the huge swollen head, and trying to breathe through her nose.
With each swallow, her breasts seemed to feel heavier, and her nipples to press harder into the bra. Still cumming wildly, and swallowing as fast as she could, she reached down to feel herself. They were noticeably bigger now. Heavier, and seemed to pulse and swell in time with her swallowing. Almost like every drop of cum was going right into building new breast flesh - filling and overfilling her hands. The bra started to feel tight on her, the weight on her chest very noticeable now as her growing tits started to stretch the straps she had just tightened. This feeling only renewed her orgasm, and her mouth flooded again - forcing her breasts larger and larger still.
Finally, she stopped cumming, and swallowed the last dollops of delicious cum - her breast shuddering just that much larger. With great effort, she forced the head out of her mouth - gasping as she took full breaths again and letting her huge cock drop onto the bed with a thud to inspected the damage.
The poor bra was stretched well beyond its limits. Her breasts pooched out of the top and bottom of the cups, mashed into a solid line of cleavage at least 8 inches long, and forcing the bra away from her chest several inches. Perfect for a titfuck, if there was any spare room, she thought, but she doubted she could get a piece of paper in there - so tightly were her breasts pressed together by the tenacious bit of foundation wear.
With her breasts swollen to at least a K-cup - the bra started creaking, as she breathed deeply with excitement. The thought of busting out of it played across her imagination, and her cock started to twitch and swell with blood, her balls to churning with fresh cum.
Surely she was big enough already.
Surely.