I don't think you blew it by advising him to take his "other business" outside, if that is what he was doing on the mlc phone. Chances are he didn't even think about what he was doing when he pulled out the phone, but your comment let him know that you were aware of what he was doing.
Don't worry about it...you called his attention to his behavior and now let it go. Enjoy the evening w/your children.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.
