Jacked Divorcee (Patreon)

Susan didn't opt for Boomgirl when she turned 18, or even in her 20s. Instead, it was after she divorced her husband at 34 that she realized, without a man around, it would be helpful for her to be stronger. Boomgirl begins to lose effectiveness after age 22 in most women, so her gynecologist recommended a larger-than-normal dose, to guarantee she'd get the full benefits of the compound.

Normally an over-the-counter product, with her doctor's prescription Susan was able to get the strongest pharmaceutical dose of Boomgirl. Both Susan and her gynecologist were surprised at how effective it was in a woman of Susan's age. At first, Susan was a bit embarrassed at how muscular she was becoming, wearing baggy clothing to conceal her increasingly massive physique, bulging arms and legs, deep chest, and wide back, all swelling ever-larger for months on end. Before the end of the first year, she'd gained over 90 pounds of muscle and quintupled her strength, with no sign of the growth slowing down. 

One Friday, though, her ex-husband showed up early to pick up their kids for the weekend and saw Susan working in the yard in a tight t-shirt. The look of absolute astonishment on his face, seeing his formerly slender wife now sporting hugely muscular limbs, was intensely gratifying for her. As he approached she felt a rush of pride and truly realized for the first time how much larger her muscles were than her former husband's, and how strange it must be for him to be realizing the same thing in reverse, that he was now far weaker than the woman he'd been with for a dozen years.

Thereafter Susan abandoned all pretense and went bare-limbed whenever possible, leaving nearly everyone stunned at her size and strength. Even in the world of Boomgirl, Susan had grown seriously swole.