Tsuma wa Kon'ya mo Ubawareru ~Seiso Kei Kyonyuu Hitozuma wa Choukyouzumi Niku Ana Dorei~

You (the protagonist) work at a major publishing company. Your wife, Sakura, is a beautiful, busty, and elegant woman two years older than you. While you and your beloved wife, Sakura, are enjoying a happy life together, one day, you receive an order from your boss to entertain the renowned writer, Haramura Seizo, along with a senior editor, to request a new book from him.
...
Little did you know that in the process, a deep, dark shadow would be cast over your beloved wife’s past and present.
She is innocent, gentle, calm, and has the most beautiful face and body that anyone could ever envy.
You will witness her unknown face and hear her unknown voice. ……
Unlike the sex that confirms your love for each other, she will indulge in an animalistic copulation...
She shakes her big tits and buttocks and screams out in a vulgar climax: ……
Is your beloved wife a slutty bitch masquerading as a neat and tidy wife? ……
Or is she a loving wife masquerading as a slut to protect her happiness with you? ……
You are about to find out: ……