Being the only child in the family, he was sure to feel lonesome even more after his mother left for God. But I'm sure he is not the only one. His father wasn't going to to be any less lonely than he was. His father loved his mother a lot. Probably more than my friend was (he probably has as much love for his mother as his father has now). It probably would have taken more time for the two of them to cheer up had they not have each other's support on his mother issue. Yes, it is good to still have a son when your wife is gone. But, there isn't the case anymore.
I'm not sure if my friend has had consideration on his father feeling. I certainly have. He asked me to kindly look after his house and his father when he is not around, I agreed but I had other opinions on my mind. When something happens, that is only that much an outsider can do. Sometimes the presence of a family member helps tremendously. I just feel kind of disappointed on my friend decision on this abroad decision.
I don't know who or what made my friend made up his mind, but I know his father loves my friend, his only son, a lot. So is my friend. As for the other person, heaven knows.