In reality there are lots of such couple where the wife (woman) is elder than her hubby (partner) for 10 -11 years as they got married when the man is an adult already then people just say that she's elder than her partner or his younger than his partner..
For me the show is also showing the difference how it would have been if this type of couple got married when the girl is at the right age of marriage...it is a 20 years old girl marrying a boy of 10-11..
It would have been indeed weird...
Your points here please.