Expanding the Family

Long story short. I'm an only child and my mother passed away when I was 9 and my father was too busy with company to think about me. I grew up to be a shy quiet man, who done very well at my studies and passed near the top of my year. My father thought me to be gay is the easiest way to describe his view of me. I didn't play men sports; I fenced, weight trained, karate and play chess which my father took to be less manly than football. So, I was really fit and didn't date and that made me gay as far as my father was concerned. His PA Susan knew differently as she had to check on me while he was in hospital. On a visit of hers to check on me we ended up in bed fucking, she was my first fuck. I shy around strangers; I've known her for years; I think my father also slept with her. But she hasn't said, I haven't asked. Anyway, the health of my father was getting worse, he put a condition in his will I had to marry and start a family within 5 years of his death. I was doing more and more at the company and still not dating, working very close to Susan and thru Susan I met Karen her quiet daughter. Anyway, my father was in hospital more and more, Susan decided I should seduce Karen and take her virginity. Karen was used to me being around Susan and her fairly often, Susan had done me the favor of taking my virginity and I decided to return the favor of taking Karen's virginity for her. All this happened before I knew about the clause in the will, Susan knew nothing of the will and didn't find out anything until my father had passed away. With Susan help I fucked Karen using a condom as a precaution and it broke during the intercourse with Karen. No worries there is little chance on your first fuck of getting pregnant. Which was wrong as Karen got pregnant, I decided to marry Karen as a result, but not just because she had gotten pregnant. But as a way to show my father I'm not gay. At the time he wasn't very well at all, I didn't want to wait until he was. So, we married and told him after he had improved, not that she was pregnant. Only that we'd married, I never got to tell him he was to be grandfather as a week after I told him I was married to Karen he passed away in his sleep. In the years since I've 4 children with Karen and still regularly fuck Susan as well. Just keeping it in the family.