"Devil in Church" joke

A few minutes before the church services start the parishioners are sitting
in their pews and talking. Suddenly, Satan appears at the front of the
church. Everyone starts screaming and running for the door, trampling
each other in a frantic effort to get away from evil incarnate. Soon
everyone is gone except for an elderly gentleman sitting calmly in his pew,
seemingly unaware that God's ultimate enemy is in his presence.
Satan walks up to the old man and asks, "Don't you know who I am?"
"Yep," the old guy replies, "sure do."
"Aren't you afraid of me?" Satan asks.
"Nope, sure ain't." says the man.
"Don't you realize I can kill you with a word?"
"Don't doubt it for a minute." says the old man.
"Don't you know that I can cause you profound, horrifying, physical
AGONY for all eternity??" persists Satan.
"Yep." is the calm reply.
"And you're still not afraid??"
"Nope."
Frustrated and more than just a little perturbed now Satan asks, "Well,
why aren't you afraid of me???"
"I've been married to your sister for over 50 years"