What a horrible thing to say. This type of micro fault-finding is the reason why so many women have body image issues.
And for your information, "hips" are not like the epidermis, hair, or even butt. The hips, or coxal bone, are bones. There's nothing healthy a person can do to keep their bones "in check". I sincerely hope no one ever criticizes you over something as unmanagable as your skeletal structure.