Wife pregnant with who she doesn't know whose she is after being ejaculated on by a mad doctor Monaka Sengoku part 1

Monaka fell ill. Her worried husband called a doctor to their home. This was the beginning of misfortune. The doctor, determined to take her body by palpation, prescribed a mysterious medicine to 'Monaka'. Her heated body refuses to listen, and she is easily ejaculated into and cuckolded. Afterwards, she is repeatedly to listen to him and repeatedly performs Nakadashi on him. Then she discovers she is pregnant, but she doesn't know whose it is and is in despair. But the real despair begins then.