The fall guy for what?
Not sure yet, but watch as this thing pivots in her direction.
We already she provided the Broadwell harassment emails to her FBI buddy.
Considering her newfound "relationship" with Allen, she may have been trying to get the stink off of herself. The fact that the FBI buddy was sending her topless pictures of himself and had to be pulled from the case is an indication that she may have had a relationship with him as well.
As I said early, it will pivot in her direction.