help: how can chirag have a grandson??

okay when chirag was coming back daksha said chirag's wife got pregnant wife during the leap and had a son, whose now grown. but daksha also said someone else got pregnant at the same time as prajakta, and had the other guy?

how can the other one be chirags grandson, one of his daughters was single until recently and the other one could not have a grown son already, maybe a baby one.

i'm sooooooooooo confused? someone help, are both whose 2 guys (the nerd and rapper) his sons????????????????????