meaning in context - Does "She had a brother" mean that her brother is dead?

My Friend has sent me this riddle to solve:

"If you solve this, then you are a genius. Mr.Smith has 4 daughters🙍‍♀🙍‍♀🙍‍♀🙍‍♀ and each daughter had a brother. How many children does Mr. Smith have now?"

He said the answer is not 5, but 4 only as in the riddle it is mentioned as each daughter had a brother. So their only brother is dead.

Is he right?