I Was Arrested for DUI, and Am Soon to Be Sentenced 2-7 Days. What Do I Tell My 2 Teenaged Sons?

I was arrested in February while still married. Our divorce is now done, and we have joint physical custody. I have entered an out-patient treatment program for alcoholism. My kids have never seen me drink in excess, and rarely saw me drink at all. Yet I admit I am an alcoholic, and my wife is addicted to prescription drugs (she’s still in denial). How much do I tell my kids when they jail me for 2-7 days (probably) and I lose my license for a year? I want to give them the truth, but how much? And should I tell them this week before court? Neither my ex nor my kids even know about the arrest or treatment yet. I am committed to quiting. What and how much do I say?