it does the opposite!

as Penny doses John with the "medicine" over the week she notices a change in John's body and body language, over the week you start to grow! your muscles fill out and soon you look bigger and buffer than your strongly built father Ryan, and soon your old pants start to stretch around your new massively large cock!

as Penny gets suspiscious of this she checks the bottle and it has a very small warning in the back "DO NOT GIVE TO BETA MALES OR ELSE THEY WILL UNLOCK THEY'RE HIDDEN POTENTIALS AS ALPHA MALES" as Penny reads this she realizes that what must've happened with John is that he was already to weak and the only waay she can think of making sure shes right she must check your cock

When she does she sees your small 3 inch cock has grown eleven inches and is now 14inches in your hand

as Penny sees this her pussy begins mmoistening and she begins to drool over you, John, her sons dick