I had 7 pound twins in 1993 by c-sec, and a prior baby by.c-sec in 1990. My highest weight was actually during my first (singleton) pregnancy, in which I had eclampsia. Fat plus fluid weight got me up to 191 lbs, and at 188 with the twins. After the twins, I got back down to 112 lbs. The excess skin on my abdomen Hung down to mid-thigh. I could pull it down through the leg holes of my panties.
I used money I got in my divorce to pay for the t.tuck in 1996, when the twins were 3 yrs old. I had to get corsette-like permanent sutures along the abdominal wall, as it not only stretched, but "unzipped". For overall sculpting, I was encouraged to also get lipo on my hips, where I always had these little fat pads, at any weight.
The over all result has been fantastic, and has held up the last 14 years, even with subsequent weight gains and losses. Future weight gain just seems to distribute differently. At any age, it's money well spent.