How to have big thighs and a small toned waist?

Hi I’m a girl who’s neither underweight or overweight. Just in the middle. How do I get big thighs while keeping my stomach flat (tight and defined with abs, not full-on abs just the visible lines)? I’ve got the body shape for it. I’m pear shaped. My thighs are slowly getting bigger, but I’m afraid I might gain weight in my stomach too. I’ve seen people who have small waists with ab lines while also having big thighs so I know it’s possible but how? Big thighs means gaining more weight (=eating more) and small waist with abs means having low body fat (=eating less) so I don’t know what to do. I’m not looking to have huge flabby thighs or muscle-y ones either. I just want it firm. Will squats help to firm big thighs? As for my stomach It’s quite flat (25 inches), but not completely if you know what I mean. I’m currently doing ab workouts and I was wondering if it’ll work to make my stomach look smaller. Help!