What was Jessica going to say about the doughnuts?

Season 3, Episode 2. Logan sends his kids a box of 'threatening' doughnuts, and there is debate as to whether they're poisoned or not. After Shiv, Roman, and Con leave, Jess walks in and an irate Kendall screams "What?!" She points to the dougnuts and says "those.... nevermind" and walks out.

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What do you think she knew?