During the recording of a commercial for Coca-Cola, which Cath is the mascot, Simone intervenes by surprise by being dressed as the mascot of Pepsi, the direct competitor of the mark that Cath represents.
Simone loves to tease her sister Cath and what could be better than being the rival Coca-Cola mascot and praising the perfect taste of Pepsi by having her sister drink it.
Cath sulks, because she does not appreciate that her sister comes to tease her, especially at her job, and tries to show that she can endure her sister's nonsense, despite her stomach full of Coca-Cola that she had to drink a lot because she had to do several video covers for the commercial.

Art : Userpage of ladiesman217 -- Fur Affinity [dot] net