Apparently this needs to be said...
Even if the Biden accusation was found to be entirely credible and proven, Sanders still wouldn't get the nomination.
Option 1: Biden continues onward as the nominee and faces Dummy, who has multiple rape allegations and is a part of the party that's actively trying to destroy women's rights.
Option 2: Biden could just finish crushing Sanders, cruise to the convention, and tell his delegates to back [insert generic Democrat] since that's what the voters want - a generic Democrat.
Sanders has been rejected in two consecutive primary cycles, Democratic voters don't want him. Sanders' two person vote share isn't that different from his six person vote share.
So, if you're pretending to care about this lady's accusation because you think it'll help Sanders, then you can stop. Short of Weinstein numbers, Biden isn't going to be suspending his campaign.
Also, here's an article that gives a pretty good overview of what's happened so far:
A woman accused Joe Biden, and all hell broke out. Here's what we know