I agree, but I can understand him not asking. He was shocked, his father was kidnapped and his brain was in "What the FUCK mode" He just did what his mother told him. His instincts were still buried by the news he just found out.
I can't imagine how I would react if I was at work minding my own business, my biggest concern being what to have for lunch. Suddenly, your mother rings and says your father is kidnapped, you have to flee work or be captured or killed. It would take a bit for the shock to wear off and the brain to engage. Everyone reacts differently under duress.
Even more scary for me is my father is dead. SO I would really be blown away.