Father in law’s Lustful Release

The eldest son and his wife, burdened by financial troubles, decide to move into his father’s house in exchange for borrowing money from him. As repayment for the principal and interest, the father demands that his daughter-in-law attend to him for the duration of the loan. However, unbeknownst to them, the father is already receiving sexual favors from his younger daughter-in-law. Who will ultimately inherit the wealth of this lustful old man?