Is this kind of marriage normal?
He has repeatedly left without telling his wife where he goes. He even did this once when she was sick, which meant she had to look after their child on her own while having the flu. When she confronts him after he returns home he refuses to tell her where he went. All he ever says in response to her asking him where he went is "I don't know."
Also, they argue a lot to the point where she will leave with the child and spent the night at a friend's place.
His hobby is fixing cars. He spends all his free time on this hobby, instead of spending time with his wife and child.
This is not my marriage btw.