Thank you for the encouragement. However, the story has already evolved in other posts here and it tends towards a different direction. It's not about a monstrous, absurd, unreal muscular growth, as it is quite common here. My purpose is to write something as realistic as possible, without losing sight of the erotic content. Stories involving magical formulas, steroid application, or special powers of superheroines seem to me to be little or not at all exciting, precisely because they are unreal.