War of the year roses raises questions

Currently I am obsessed with war of the roses. Today I listened to an episode where the girls boyfriend (she was the caller) was not cheating; clearly stated he still loved her and thought she was great but he was not attracted to her anymore. He stated she had gained 50-60 pounds and stopped wanting to do anything. They used to be super active together, now she doesn’t want to do anything. He nicely suggested going on walks and hikes together she always says no. Anyway she went off the rails and started calling him sexist and saying that because she didn’t live up to the mans standard of beauty he no longer was attracted to her. So I can see her point but honestly I personally could see his point too. He was not cheating, he still loved her but he wanted her to be healthy. So my question is who, in your opinion, is in the right. He wasn’t mean he didn’t say mean things he was just honest.