Simply confront him
From Create Your Own Story
"What are you doing in my house?"
He raises an eyebrow. "The fuck does it look like?"
You both stare at each for another few more drawn out seconds before a grin spreads across the burglar's face. He reaches down to stroke at his bulge while beckoning you to come over. You stare down mesmerized for a bit before snapping back into focus.
What do you do?