Nah your body changes significantly when you get around 30.
Maybe if you dont take care of yourself. Im in the best shape of my life and im 32 now. Her suddenly turning into a slim thick bih in 5 years unless she start eating a lot and lifting as well is kind of a long shot.
She a lil skinny chick with no curves probs gon stay that way. Ain really my steez but if nikkas like it I love it