Casper Smart -- J.Lo's Secret Sugar Daddy ... At MTV VMAs

Jennifer Lopez and Casper Smart REUNITED at the MTV VMAs ... if only for a quick second ... when the dancer made J.Lo an offer she couldn't refuse -- Skittles.

Despite the fact they were sitting in different sections, Casper made his way over to Jennifer's section during a commercial break with a sugary peace offering ... and the whole thing was captured on the VMA livestream.

As we previously reported, the two were spotted out together earlier this week -- despite the fact they recently broke up.