my stomach is horrid.. it is totally covered in streach marks, from bottom of belly right way up to just under where bottom bra sits

this was caused by having an 11 pound baby and then large twins year later lol.. thing is it totally gets me down.. i know if i do sit ups etc then it will tone my muscles back in.. i know i will probably always have an overhang with my stomach as had 2 sections, but is there anythin i can do with the skin on my belly... the stretch marks are more wrinkly now

if i put py stomacch side ways you can see strech marks but it flattens them out and looks better lol.. i wouldnt mind that.. am i destined to be like this forever unless i have surgery?