I love my Aunt

I'm Paul 23 oldest of three, my mother Terresa is the oldest of twelve and my Robyn 23 is the youngest of the twelve. I was born a month before Robyn and was raised in the same house and did all my schooling with Robyn. We even share the cot for two years and a bed for 9 years. We're like twins and seem to know what the other is thinking, so when we were 18 and at the movies, I started getting horny she knew without looking at me. We had kissed before and even showered together, but nothing more till that night and when the movie finished we had sex for the first time. We're still together and the whole family knows we're lovers and don't try to stop us. Last year I got a job interstate and Robyn moved there with me and live together as man and wife. She is 7 months pregnant and all test show the baby is okay.