I... I need... OMG seriously in 1st

I'm writing here because I yet again can't access OD when I need it most. Oh buddy I need it seriously... so here I am. Background: My parents have been separated for 4 1/2 years. For the longest time mom was hopeful they would work things out. It really comes down to dad getting his shit straight and acting like an adult, which he won't. Mom got a place dad lives in the attic. Mom pays bills and has a job. Dad has his business and doesn't pay any bills because he doesn't make any money doing it. My sister was in an accident when she was 17 (30 now) which did a number on her brain. She has been living with mom. She is fully capable with the exception of driving, which is why she was living with mom because... she also has a child and child with no way to get here and there would just be too much ya know?... K... big need to write about event...Mom has had a boyfriend for about a year now... he's always busy so I haven't met him but we are talking ... dancing by a bonfire and sitting watching stars as being regular occurances. So, it really appears as if they enjoy the company of the other.... I dont' even know how to say this really... My mind is all messed up... My sister was caught in bed with my mother's boyfriend. Yes. Call Jerry. Seriously, I don't even know how to wrap my head around this.