She often unapologetically hit on Dora while she and Marten were together. Or similarly, would express her desire to hookup with Dora to Marten. Shes a shitty friends that has gotten a lot of free passes; remember how she got away with keeping her library job? That all sucks.

Worse to me is this was the start of JJs mangled idea of LGBT relationships. From the QC wiki:

She decided to hang out more with Marten, under the thesis that he "attract[s] hot chicks like moths to a flame. Eventually ONE of 'em is gonna be into ladies."[20] One time, she got drunk at Marten and Faye's apartment, climbed into Faye's lap, and wouldn't let go, to Faye's annoyance.[21][22] She hit on Hannelore[23]Cosette,[24] asked Marigold out to dinner[25] and offered to make out with her.[26] After meeting Marten's mom, she tried to get her to go clubbing, but Veronica turned her down.[27]