A few years later, my parents were between 20 and 40 years old.

The prime numbers between 20 and 40 are: 23, 29, 3 1, 37.

The age of a family of three is a prime number, and the age of the daughter plus the age of the mother is exactly equal to the age of the father.

According to the difference of 23,29,365,438+0,37, the daughter can only be 2 years old.

Then the ages of father and mother are 3 1 and 29, respectively.

The two girls were born at the age of 29 and 27 respectively.

That is, the age of marriage is 24 and 22 respectively.

The total age of the couple when they got married was 24+22=46.