Dad was in the field plowing
when he noticed Mary run into the barn.
A few seconds later Bubba runs into the barn after her. After about 20 minutes they still haven't come out of the barn, So Dad decides to see what they are doing.
As he walks into the barn he see's Bubba on top of Mary and he was going to town, Dad thinks to himself that dirty bastard and picks up a shovel and whacks Bubba on the ass with it. Bubba jumps up and runs outside.
Mary was still lying on the floor trying to cover up her modesty, Dad looked down at her and said "I didn't think you had it in you Mary."
"Neither did I dad" said Mary "until you hit him on the ass with the shovel..."