We believed she had a condition because really all our female and most male relatives are really slim or even a bit underweight.   And even the ones that are not slim still are average sizes.   She is the only obese one, so we all thought she had a mutation of some sort. Only found out about her snacking after she casually mentioned it while being on the phone with my mom.   Its the healthy = low calories thinking. I can't believe i have an obese fatlogic person being related to me.