Kuroki Aimu – Unfulfilled Young Wife Drowns in the Pleasures of Sex.

Her husband is away on business, so she’s staying with her in-law. She’s not satisfied, so she masturbates every day to deal with her loneliness. One day, her in-law sees her. He feels bad for his horny in-law… saying he’ll satisfy her. At first, she’s shy, but her guilt towards her husband fades, and she starts craving her in-law for the pleasure her husband can’t give her.