@avenger85: Do you know why people think Rachel and Logan are related?
It's a long-ass story. I'd recommend you to check the CBR forums for it. Some people there are so obsessed with the Cyclops Hate to the point where they've done a kind of thesis on scientifically proving that Rachel is Logan's daughter lol.
Good question, how exactly are these two related tho? Rachel is Jean/Logan's daughter from alternate future, where as cable is Madeline/Scotts son. So would you say they are half sister/brother or no relation as its an alternate reality/future.