You shouldn't make negative comments about someone's appearance.
As the school year just started, Jane meets all her friends again and notices Mary has gained weight.
Jane wants to respond to Mary's look.
Jane advises Mary to keep watch of her weight in order to stay healthy.
Jane criticizes that Mary must have eaten a lot during the summer that has caused her to look obese.
Mary thanks Jane for her advice, and they start to talk about ways to lose weight.
Mary feels hurt and refuses to talk.