Does seclusion (khalwah) cease if a woman rides with a driver and her son, who has not yet reached the age of ten?

Question:
He says: Honorable Shaykh, may Allah grant you success. Also, when a woman rides with a driver within the city, accompanied by her son or daughter, and their ages have not exceeded ten, but they are of an age to distinguish right from wrong, does the seclusion cease in that case?

Answer:
No, the seclusion does not cease in that case. Yes.