My step sister and I had unprotected sex, now she's pregnant with his child

I used to be pretty close with my step-sis, but things changed when we had unprotected sex. Now, her mom is freaking out because she's pregnant with my kid. I guess it's a little crazy, but at the same time, it's kind of exciting. My step-sis is the hottest girl I've ever seen. She's a total MILF with an amazing ass that just begs to be fucked. When we're alone, we can't help ourselves from getting it on. Sometimes she rides me like a cowgirl, other times she gets on her knees and lets me fuck her doggy style. But my favorite position by far is when I get to fuck her from behind. It's a sight to behold when she's bent over, ready for me to pound her asshole. And when I finally shoot my load, it's like a fucking cum machine.