Suspicious

"So, did the robbers harm you?" Hannah's boyfriend asked.

He looked around and didn't see anything missing, nor any dresser drawers open and he noticed the sheets were wadded up on the floor.

"No, they were going to rob us, then heard you come home and ran out the windows."

"I didn't hear or see anything."

He walked over to the window and looked out and saw one set of shoe prints.

"You gonna untie me?!" called Hannah.

Her boyfriend looked around and saw nothing out of place.
He walked back to Hannah.

"How did they manage to get you naked and tie you up?"
"Uh...um...I was about to take a shower when they came in. One had a knife."
"And they stole nothing?"
"No, nothing! Now please untie me."

He paused for a minute and chose his next words carefully.

"Good thing they brought ropes and a ball gag with them, isn't it" he asked sarcastically.
"Um...I guess they knew I'd be home."
"Why rob the house when they know someone's here?"

Hannah turned red and stammered.