Thanks for addressing everyone's questions. It makes your story that much more credible.I don't have such a fantasy to be ruined.
Why did you resurrect this ancient thread?
Have a little word, say although there is nothing wrong with being curious, but as you are friends with his father, it makes for a strange dynamic and you don't feel it is appropriate. Ask him if he has any questions, it is possible he might not be able to talk to his dad, perhaps he is just curious, perhaps he is gay. Either way nothing wrong with either but a chat might assist him and your feeling of discomfort.
An excellent point.
I caught him watching me through the key hole of the bathroon while I was showering.
What's a keyhole?
What's a keyhole?