Daughter-in-law no match for father-in-law's lewd skills; wife's extramarital affair brings her intense pleasure (MMB-033)

The father-in-law often experienced sudden back pain, and his daughter-in-law, worried about him, arranged for him to stay at their house for easier care. However, while her husband was at work, the father-in-law couldn't resist his long-suppressed desires and pushed her down. Initially, they strongly resisted, but gradually they accepted this secret pleasure...