I'm a woman and the only "weight lifting" I do is a core fitness class. My waist got down to 29 inches at one point before I started the class, but now is back to 30.5 inches. Perhaps the 29 inches was a fluke. I may have begun to break my stall because some of my pants have gotten suddenly really loose, but my waist hasn't changed. I figure things will change when they will change.
If I were you I would nix the 2nd dinner thing though.
Female, 5'3", 50, Max squat: 202.5lbs. Max deadlift: 225 x 3.