Will laser lipo help tighten my skin and reduce the belly fat? (Photo)

Good thorough liposuction can improve your shape and contour and with laser accomplish good skin tightening. The problem I see on your pictures is that it seems that you also have abdominal muscle relaxation that can only be solved by muscle plication during a tummy tuck. If you want the best results you need a combination of liposuction and tummy tuck that would enhance not only your shape but also flatten your abdomen and remove excessive skin. When you perform a cosmetic procedure think hard what you really want and don't go for anything less than what can accomplish those expectations, otherwise you will not be happy. 

Thanks for the questions, first your local spa is probably offering something non surgical and I would highly suggest you not doing it because it is unlikely to work. I would say if you just wanted to a quick change with minimal downtime and scarring liposuction is your best bet but since your pregnancies have stretched out your muscles if you want your core tight again you would have to go with a tummy tuck but that will have more scarring/downtime

Tightening skin via lipo has been over sold and the results have under delivered.  I will say that in certain skin types that tightening does occur.  Looking at your two pictures you can try a multitude of different procedures from Vaser/smart  Liposuction (which will remove fat as well) to ThermiTight which is a probe that uses Radiofrequency to heat up the underlying skin and the result is tightening.  Having said all that, a consultation and evaluation would be paramount as texture and skin quality will play a major role in determining your final results.
Good Luck