i think he will be tired of taking care of his son so find a right time and place and do it. ask him though. dont be pushy
I have a saying: If in doubt, DONT DO IT. Please be careful. People can be different when you meet them face to face, even if you think you know everything there is to know. Just do what feels right for you, and you will be fine :))
Do what feels right for you at the time.