Katie was a woman whom Cameron Tucker tried to pick up at a bar pretending to be straight in "Treehouse".
Cam made a bet with Mitch that he could get a woman's phone number at the bar, after Mitch told him that he was clearly gay and that everyone could see it. Cam then approached Katie and managed to take her number. Cam felt guilty that he made a woman believe he was straight and that she would be waiting for him to call her, so he decided to call her and told her the truth. He called her, but instead of telling her the truth, he invited her over. Katie came and finally Cam told her that he was gay. When she heard this, Katie was confused and told him that she knew, noting there were obvious signs and reveals that she just wanted a gay friend. Cam was shocked and she asked him why he tried to lie, as he explained about the bet to her, stating he wanted to know he was attractive to both genders. When Mitchell came back home, Cam was about to confess truth but she saved him and acted like she was furious and stated she believed that Cam was straight, because she did not want Mitch to make fun of Cam. She left upset, but before she did, she passionately kissed Cam, in front of Mitch who is left in shock. After the performance, she slyly smiled to Cam and told him to call her to continue their friendship, something he agreed to while boasting to Mitchell.