What is the man’ s hobby?

M: Hello!
W: Alex! What are you up to?
M: I’ m painting. You know that’ s what I enjoy most. How about you, Sophie?
W: I’m on the Net. And where’ s your brother?
M: Mike? He’ s cycling with his friends. They won’t be home till much later.
W: What a pity! I’m just calling because Lily promised to show him her book collection today. Anyway, since your brother is not there she’ s probably going to spend her day on the phone with my aunt Vicky.
M: So, even if I tell my brother to call Lily when he comes home, your phone line will be busy.
W: Probably! Let’ s just leave it for next weekend.
M: OK.