The mamas in the royal family are asked a lot of very personal questions and this week the Duchess of Cambridge handled one perfectly. As Hello reports, during a tour of Bradford, Yorkshire this week a fan asked Kate Middleton whether she and Prince William were planning to have another child.

"I don't think William wants any more," Middleton told the young man, who is autistic and has DiGeorge syndrome.

The fan asked the question because he had sent the Duke and Duchess cards after the births of their three children, 6-year-old Prince George, 4-year-old Princess Charlotte, and 1-year-old Prince Louis.

It was an understandable and sweet question coming from this young man, but one that would not have been so understandable coming from the press (or from bookies taking bets on the matter).

As many non-royal mothers have pointed out in recent years, family planning is a private matter and questions about the size or future of one's family can be difficult for people.

But this is not the first time Middleton has fielded that question. Last February Kate Middleton was asked a similar question by a fan in Northern Ireland. She was admiring the new father's own baby when he asked her "baby number four?" to which she replied, "I think William would be a little worried."

Indeed, Prince William has previously admitted that being a father of three can be quite tiring (he's not the only parent to think so, either: A survey found moms of three are more stressed-out than moms of four).

The way Kate phrased her public denials of plans for a fourth baby makes it sound like three is William's preferred number, not hers—but the deflection may have just been her way of joking about an uncomfortable question. That's the problem with these kinds of questions. They do put moms (royal or not) on the spot. Maybe Kate would go for another baby, or maybe she and William both think three is the best number for them.

Couples often disagree about how many children to have and the perfect number of children is different for everyone. These decisions often involve compromise and deep consideration for couples. The royal family has a lot of privileges (like nannies and housekeeping staff and funds for tuition at any school) most parents don't have, but they also have a lot of unique stressors in their lives. Three may be enough for Will and Kate, and it's really no one's business but theirs.