Why are my hips wider now after my Tummy tuck/mini leg lift?

There is really no reason for your surgery to have made your hips wider--tummy tuck surgery does not move tissue from one place to another, it removes tissue only. You either have some retained fluid (seroma) in your abdomen or you have gained some weight since your surgery.

and not touched with your procedures.  If you have objective proof such as measurements, swelling will be the suspected culprit.  But if you do not have measurements and it only looks wider then I would speculate that its because your tummy and thighs look smaller from your procedure.

Tummy tuck surgery
has no direct effect on your hips. We address the abdominal region and
flank area of the abdomen but not the hips. You certainly can still have some
swelling 3 months out that may be affecting your clothing. Especially with
whatever the leg lift part of the procedure was. I know of a thigh lift
but not sure what you mean by leg lift. Being that said anything you had done
to your legs surgery wise may still be affecting the way your clothing fits.
Just stay in touch with your surgeon.