La cognata mi chiede se ha un culo migliore di sua sorella e lei balla per me così posso vederla meglio e scoparla

My sister-in-law is always competitive with my wife, but this time she has reached the extreme that she asks me which ass is better, hers or her sister's, and to show that hers is better, she shakes it and lets me fuck her so I know that her ass is the best