Sister-in-Law

My brother got drunk and then rolled his car, and died at the scene. Leaving a wife (26) and a baby daughter (7 months). I (30) am the older brother and was single, and the best placed to assist my sister-in-law and niece. My career is very successful, and I have my own home. In no relationship at the time, not chasing one either. Concentrating on my career first before relationships. As my sister-in-law couldn't afford to rent a suitable place to bring her daughter, she moved in with me. She would run the house, and I would pay the bills. Worked well for a few months, then she caught me masturbating. She took over masturbating me and got me off. That night, she joined me in my bed, and she became my lover. Fast forward several months, and she was sleeping with me every night and got pregnant. I took the easiest way out and married her. She is now 6months pregnant, and I have adopted my niece.