I think I need more details to form an opinion. If he is living with you, you probably should tell him (if you think it is safe.) If you are separated, I think I would wait until he's served.
Mostly, I think I would wait until I had talked to the pastor, especially if you are both members of the church.
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married 30 years; daughter #1 + grandson;
daughter #2 + granddaughter; 1 big dog; various cats
I'd rather be at the beach