Brooks Nader does not mess around when it comes to her Poppi — and she’s willing to slap sister Sarah Jane Nader to get what she wants.

In Us Weekly’s exclusive first look at a new social campaign for Poppi, Brooks, 28, and sisters Sarah Jane, 23, Mary Holland Nader and Grace Ann Nader all gathered around a couch to celebrate “Sismas” — a holiday Brooks hosts and described as “a time for all of us to get together, have our favorite food, have our favorite drinks, get a little drunk, spill all the tea. The usual sister stuff.”

While celebrating, Brooks opened their fridge — and was upset when she couldn’t find the Cranberry Fizz Poppi flavor. Marching back into the room, Brooks demanded to know who stole the drink.

“Nobody took your CranFizz,” Sarah Jane said, while Brooks replied, “Shut

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