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She is very aggressive toward anyone whom she deems a threat to her business, as she once warned Marge to "stay off the West Side!" and said to Gil "Were you talking about the West Side?", to which he responds "No, Cookie, I swear! I'm-I'm scared of you!"
Both Cookie and Lindsay Naegle often look for a man. She once offered Homer to move to her house. She once had a relation with Mayor Quimby and they had a son, but Quimby gave him to one of his bodyguards, so she was one of the 37 woman filing paternity suits against Quimby.
Cookie went to Camp Land-A-Man with Marge, Helen Lovejoy, Luann Van Houten, Patty and Selma when she was a child. Marge had a date with Homer, but he wasn't present, so Marge went out of the camp. Cookie told everyone at the camp about it and that Marge was pregnant.