Bitter Divorce

My sister Donna 30 married Donald against our parents advice and they won't have anything to do with her for the last 8 years. I'm Markus 28 doing okay career wise, but not in a relationship. I bought a 3 bedroom house and doing it up and not dating at all. Then Donna and Donald split up last year and divorced and it was bitter, in the end she half of nothing and he left the country. I got a call from her, she was unemployed, homeless and broke. I told her to catch a cab and I'll pay the driver, which I did. She had 2 suitcases with her, that was everything she owned. I showed to a bedroom and then she wanted a bath, it would her first in days she said and let her do what she needed to do. Later on I had ordered in dinner as I'm no cook and she told of her problems and I said your okay now stay as long as you want and I'll help you as much as I can. Over the next few days she tried to find work, nothing that suited her. Meaning enabling her to get her own place and live. There was one career that might do that but she didn't want to sell herself to strangers. Anyway I gave her money when she needed it and when she asked why I didn't I said I'm not their type. Who's type she asked, I replied every girl I ask type. She grinned and it was great to see her grin, smile whatever. She asked me would I like to see a movie or something to get out of the house for awhile. Okay and we looked at what was on and went and seen it and a couple drinks and came home. I got ready for bed and Donna came into my totally naked. I looked at her and she said I'll join you tonight and you can give your hand a rest. Shocked is a understatement but I was shocked, anyway as we grew up she always got her way and I went with the flow and fucked my sister. Which I enjoyed very much indeed and we fucked again in the morning and then I went to work. I got home Donna was doing some cleaning and said dinner's cooking and I said great. She then added I've moved all my stuff into your bedroom, as I'm going to be sleeping with you now. A little shocked and happy also and that how it is today. Only one change she is 4 months pregnant to me and our parents only know she living with me and pregnant. Probably think the baby is Donald's. Because they referred to him as a low down scumbag asshole several times and ever when she married him, they never called him names.