Decided to save the family line

Our family was once numerous and wealthy, but over the years numbers reduced greatly. One benefit was concentrating the wealth, finally down to just the five of us. Only me 31 and my younger cousin 27 were able reproduce as the three others were all over fifty and female. Also, we were quite happy with our financial situation, not wanting to add outsiders into the family. So, we decided to keep it inhouse as they say, having researched incest and found only long-term family practice of incest leads to problems. With no incest we could find in the family history, we started and I quickly got my cousin pregnant. She had a healthy son, so as quick as was possible I got her pregnant again a daughter that time. I'm now 40 and have fathered 6 children with my cousin 4 boys 2 girls including one set of twin boys. The family line is secure once more.