While you were busy imagine her in panties, your cousin's wife got back to the house.
"I think I forgot my ke.... what the...."?
It wasn't a smart move to leave it open, not smart at all.
She stand for a second trying to figure out what is she looking at.
"Is that...."? she tells herself as she is getting closer to see if she is seeing right.
"OH MY FUCKING GOD" I guess that's why he got all red.