I wouldn't go so far as to call it rape in my case, but yeah, lots of people I was friends with are still friends with my psycho-ex, go out for a beer, share a joke and a few good times with him. I let the friendships slide after that. I figured that it would be better for me to be out of a circle where persistant and sustained domestic abuse could be overlooked if the perp was a fun guy to hang with sometimes.
Back OT: As for why the woman in this case didn't report it at the time - well, all victims react differently. Some take it to the police and try and get the legal ball rolling straight away, others withdraw into themselves with shock and shame, maybe even denying to themselves that it happened for a long time afterwards as they simply can't cope with it. Non of us know how we would handle such a horrendous ordeal as being raped unless we experience it as our everyday logical side can tell us that we'd do one thing when its all just hypothetical but reality can often be very, very different. If these allegations are true then it could be that the woman bringing this case falls into the latter catagory, and was in denial about it in the immediate aftermath.