What kind of father asks his son to hold his sigarette? I would never do that, even if it's for just two seconds, even if my child says it's okay.
This gives a totally wrong message. And if he smokes, well it's very sad. I hope he will stop very fast. It's very cool to smoke, especially in the aristocratic/snobbish groups, most of them stops or only smoke occasionally. I did smoke at that kind of parties, occasionally. But I see a lot of friends struggling with cigarette and alcohol dependence, and it's very sad.