How Long Until Scar Tissue Forms Inside After Smart Lipo?

8 weeks ago, I had a little more Smart Lipo (1/2 litre) done after a previous op 5 months before (removed 1 litre). I had no loose skin but thickened areas of fat that my surgeon agreed would look better removed.

I'm really pleased with it; but I have noticed that although my tummy is flat and you can see my abs more, when I sit down and if I don't sit up very straight when in a bikini, I'm aware of slightly loose skin.

How long until the scar tissue forms inside, which I hope will help it tighten the skin a little more? How long does it take for the superficial skin to shrink as much as it is going to?