The husband is infertile, the daughter-in-law has sex and becomes pregnant with her father-in-law

I have been married to my wife Erika for three years. The relationship between the two is very harmonious, but every time I meet my father who runs the company, I get into trouble because of the pressure on the successor. However, it seemed that I was the cause of infertility... I couldn't accept the reality and hid the test results, but the father who visited the house found the test results. My father was angry that I wouldn't let him take over the company, and Erika said she was pregnant with his father's child to protect me.