Hip Widening

I know during pregnancy our hips widen to make room for baby, but do they go back? After baby #1 I was at prebaby weight in 3months, in prebaby clothes. With baby #2 it took 6 months to loose the weight and be in prebaby clothes. Baby #3 is 2 1/2 months and I'm only 10lbs away but jeans/dress pants aren't anywhere near fitting. Does 10lbs really make that much of a difference? Or is it the hips? I'm comfortable with my weight but my clothes don't fit. I could buy a bigger size but I don't want to spend the money if my old clothes will fit again.