Having lost 110 lbs myself (childhoodobesitythanksmom), I can say without a doubt that she has lost weight recently, probably at least 60 lbs.  That drooping belly is caused by extra skin  (though she still has quite a bit of stomach fat to lose - my stomach has a VERY slight "pooch" over the belly button when I stand straight, and ab definition is hard to achieve because of my excess skin, but I no longer have a layer of fat under that floppy skin)