While Kara was in the shower. Her brother-in-law walked by and heard her frustration and asked if everything was OK. When she said she was having troubles, he asked if there was anything he could do to help. She giggled and asked if he would want to shave her asshole for her because she couldn't reach. At first he wasn't expecting it but he had been fantasizing about fucking his wife's sister since they met and took the opportunity as soon as he could. They had to be quiet because she was upstairs taking a nap but everything came out and came in.. smooth as butter ??