There was a reason....
In initial episodes, one time ashwini said that 28 years of married life...so according to that virat was 27.
Later on after sai second accident they celebrated Ash Ninu..37th wedding anniversary. And virat born with in a year, so according that virat was 36..
36+ 4 years of sai MBBS(anniversary time sai was n second year)+ 1 year internship +7/8 years leap = 48/49 years
3