I cannot help but think that this allegation is an inducement for him to 'plea bargain'.
Rape of an adult female, although horrendous in itself, is less horrific than rape of underage boys.
These 'allegations' are bound to be investigated because there is a tidal wave of Mps requesting an enquiry.
How thorough that will be is debatable.
PS looks like Exaro News led with the story
http://www.exaronews.com/articles/52...HDo3-o.twitter