I Would Love To Have Sex With My Sister If I Got The Chance.

I have a brother who is 29 and i have a sister who is now 18. Me and my brother share the same father and me and my sister share the same mother. My mother were having an affair with my brother's dad and got pregnant and here i am. My sister's father is a decent man who runs a local church in our community. Me and my sister are active members in our church except our mother.
My oldest brother is also a member of the same church and he is also active. He plays the organ. Everyone sees us as one family except that my brother and my sister are not biological. His mother migrated a couple of years ago and he now lives by himself just a block away from where we live. I turned up at his house one day without notifying him. I tried to let myself in but the place was sealed shut. I called out and got no answer so i did what i always did and that is to enter through a window around the back that i knew had no lock on it. When i entered the room i heard screaming coming from a certain section. I slowly snooped around as i drew closer to where the sound was coming from only to see my brother aggressively pounding my sister. It shocked me like a lightning bolt. She was crying like a baby but in a sexual way and my virgin cock got hard instantly. I watched until they both collapse on the bed then i snuck back through the window.

I started studying their pattern and realized they are fucking each other after a meeting we always have on Wednesdays. They always waited patiently until i left so i pretended then i drop by and used the same window to enter. There they are doing their thing. He fucks her really hard and sometimes i feel her crying is genuine. After seeing all of this i now want sex, even if i can get some from my sister who never looked at me that way.