REMEMBER twisted Luke Wright? Well, old Luke of Buffalo, NY is just about as sick as they come. Luke was convicted of raping, torturing and sodomizing his 23-year-old mentally disabled half-sister, Laura Cummings. He was not convicted of murder but his mother, Eva Cummings was, and she's now serving a 52 years to life sentence. Cops have called the revolting case one of the most disgusting they've ever seen and admitted 