Playing around with Sis

I live with my sister Janice 25 and neither of us dated much at all. So during the Christmas holiday we started mucking about and ended up fucking. Neither of us are anything special in looks or build, but we have always been very close and got closer. After the holidays I couldn't think of dating anyone and was only interested in Janice, she likewise only wanted to be with me. We started sharing the same bed every night and finally made a mistake and Janice got pregnant. That didn't dampen our sexual activity and we have continued a regular sex life since. Janice is 7 months pregnant and all test show nothing wrong with the baby. Our mother Sarah has come to live with us, our father left us before Janice was born. I'm Basil 27 my sister's lover.