I'm going to agree to a morning workout with a friend without running it by my wife
How come you will not tell your wife?
I just want to have some time by myself.
Going for a run in the morning is a good way to workout and clear your head. Not every decision needs to be ran by your wife, you can make some on your own.
I'll talk to her about it later.
Sounds good. Just because you are married doesn't mean you have to do everything together like conjoined twins. It is good to have your own time and space to relax apart.