obviously the petite and likely vain woman was in the wrong here.
#1, she was a standby.
#2, the passenger involved is a mere child.
#3, for anybody the weight is a sore subject, but this is especially so for a teenage girl.
stay silent to minimize hurt feelings, that is the new norm. so shut up and start building bigger planes with bigger seats. the population demands it, without any commotion.
Just follow the lead of the clothing industry, within 60 years “what was a size 8 in the 1950s had become a 4 by the 1970s and 00 today.” The women all feel better about themselves and we just keep growing… all is well in the land of the plenty. that is ultimately what is the most important.