So I gave Jenny a real fertility potion before playing with the diceDo you mean she still isn't pregnant?
Jenny is infertile, which means you need the enhanced fertility potion to even have a chance at impregnating her. Even then, the chance of impregnating a girl who is infertile with the enhanced fertility potion is still only 25%, so it might take more than just two attempts.
Winning Dice sex with Jenny will have a 50% effect on using the Enhanced Fertility Potion?
Because I've been giving fake fertility potions to play with dice
After winning the dice, I used the Fertility Enhancement Potion before having sex with Jenny