Your girlfriend try's on some clothes that used to fit her (jeans, leggings & shorts) and discovers she can't get them on, especially over her big hips and ass! She didn't realize she has put on so much weight, why didn't you tell her? She tells you how much she's put on , and is insecure about it as she tries on the clothes and shows off her newfound chubby wobbly bits. You admit you like her gaining weight and it turns you on, which gives her some confidence to show off her fatter body to you, wobbling her belly and bigger boobs, doing jumping jacks etc. She encourages you to jerk and cum for her soft jiggly body as she tells you that she is willing to get fatter and fatter for you since you like it so much! She jiggles her rolls and bounces her ass as you orgasm! She is so relieved she doesn't have to worry about her weight around you!