Met up with my parents earlier today, first time we've seen them in person since Feb. The topic of schools came up, to which my mum said "I think schools need to go back so that [DD15] can get some exercise, she's gained a lot of weight." DD heard this, she was part of the conversation. She hasn't gained a lot of weight. AIBU to be pissed off that my mum said this, and especially to a teenage girl?