According to the search results, Sheila Jackson is a character in the TV show Shameless. She is introduced as the agoraphobic mother of Karen Jackson and becomes Franks main love interest for the first five seasons. Sheila has agoraphobia, which is a fear of leaving one's home, and this is a key aspect of her character. In season 5, her house is accidentally destroyed, which leads her to leave Chicago and explore the countryside in an RV. There is no indication that she returns to the show after this point.