What can I do to remove excess stretched skin under butt, saggy butt stretched skin and loose tissue? (photo)

Having 2 kids, my abs are trim taught and unscathed. However my behind wasn't so lucky. I was left with huge out of proportioned thighs and have had lip twice inner outer thighs, banana rolls but no my butt as they did not want it to drop more. Well it did! I really would love to have this fixed. Wearing tights side on the bottom of my butt literally sags. Please tell me what is required to fix this. Would a lower butt lift alone? I'd like skin removed.