Mary was exausted thanks to the cola orgasm. The kitchen got sprayed by cola coming out of her breasts and vagina. The blank vial apparently have issues when it come to carbonised liquid. When Mary drank some, her breasts was overfilled with shaken cola. Because it took a lot of energy out of her, she was drifting to sleep on the floor.
However, she suddenly wake up when she heard a knock on the door. She was about to open it, but then she notice that she was naked and drenched in cola that dripping off her body and leaking off her nipples and pussy.
So, at least to look a little more presentable, Mary gone to the bathroom, rinse the cola off her body and put on a bathrobe. Once satisfied, she go at the door to see who is.