The wife is promiscuous but the husband is indifferent, but it's okay because his father-in-law takes care of him

Kojima Minami is a fragile and horny daughter-in-law whose husband cannot serve her sexually, so he masturbates looking after the toilet every day. Just like that, she masturbated until her father-in-law discovered her and he showed her how to be polite. From then on, this extramarital affair went on extremely hotly, sometimes the two of them had sex while the husband was still at home, that's how it got better. How does this fascinating story develop? Please follow along!!