You games are always creative, that probably their best "selling" point. Since your taking suggestions I figured I'd try to sneak in some of my own ideas:
1. In some of the special areas you can find new ingredients to add to the mix, like in the forest there is that mushroom. These items can be reused much like the potions for many new and fun outcomes, all without increasing the amount of potions you need to have at the start.
2. Sleeping Beauty + Castle + Horny Prince = Before waking the princess with a kiss, this prince has a bit of fun with her.
3. Native American Woman + Forest + Sneaky Kid = As the woman is looking at the mushroom the sneaky kid comes from behind her and makes use of her position to have some fun.
4. Hot Teacher + Classroom + Nerdy Kid = Kid stops time with an invention, and uses the chance to have some fun with his hot teacher.
I have plenty more ideas, but I'll just put these up for now. Keep up the good work!