Now, ever since Mary had taken all of these vials, she had gained quite a bit of height, and she currently stood at a towering 6’6. And while she still was a bit trepidatious about increasing her height, she had become exponentially more confident with each passing change, and her previous nervousness was virtually out the window at this point.
Grinning, Mary snatched up the Height + vial with her upper right arm, careful not to shatter it with her godlike strength, and downed the whole thing in about three seconds.
The changes were near immediate, and Mary felt the same sensation she had felt when she gained height earlier - an ethereal feeling of just growing. She shot past 7’, 8’, 9’, eventually stopping at a titanic 10’6. Of course, her proportions expanded along with this, making her even more massive.
Mary was a little put back at this, but then she remembered earlier. The first Height + vial she drank had made her grow one foot, and then the next made her grow two... which meant that each vial would make her grow corresponding with an exponential sequence. If she was correct, she would grow another 8 feet with the next vial, then 16 feet, then 32, and so on.
Curious, Mary decided to test her hypothesis, downing another Height + vial. She felt the same sensation again, mixed in with a bit of vertigo. This time, her inching growth brought her immense pleasure. Just the thought of being a nearly-all-powerful giantess gave her incredible levels of arousal. She began to rub herself, bathing in the ecstasy of her gargantuan body. Mary bit back a moan as she passed 16’, still growing. As her growth spurt reached its climax, she climaxed as well, spraying her juices all over the ruins of her neighborhood.
Relishing the afterglow, Mary heaved a happy sigh. She looked down at her truly titanic 18’6 tall body, rippling with dense muscle, breasts as large as her head, eight arms, and an overall imposing stature.
Mary wasn’t done, though, and reached over to the box of vials to pick out her next one.