Our niece, 5, is twice the size of children her age, what can we say to her overweight parents?

DEAR ABBY: My niece, who just turned 5, is twice the size of a normal child her age. Her parents are also overweight. They let her eat what she wants, and the amount of food is what an adult would eat. I am so worried, both from a health perspective as well as about social acceptance by her peers. Must I shut my mouth? How can I address this without alienating them, as I cherish our relationship? — WORRIED IN THE MIDWEST

https://www.nj.com/advice/2023/08/dear-abby-our-niece-5-is-twice-the-size-of-children-her-age-what-can-we-say-to-her-overweight-parents.html