1st of all, the bus in the film is LAVENDER, not pink. Not even remotely pink. As Felicia might say, 'what kind of a gay man are you?'
2nd, Tick's son is at least 9 in the film. When talking to Bernadette, Tick specifically says 'I haven't seen her (meaning his wife) in 8 years.' Since we know the son was born before Tick left, that means he can't be younger than 9.