She's Married But With My Baby

I got kicked out by my girlfriend cause she found I was fucking Paul's wife, my sister. They let me live with them until I found a place. We started doing things in our early teens. And once I moved in we got to close and ended up screwing without protection. My sister wants me to stay with them but my brother in- law is saying it's time I leave. He found out she's pregnant but they always used condoms. I think he knows she carrying my baby. I can do my job anywhere in the world so I asked her to leave him and run away with me. I hope she comes with me cause I did fall in love with her when we were still in high school.