She could hear the cries, the pleas for help that she normally would not ignore, but this time she turned her back. She turned her back because she knew that if she did something, the consequences would be far far worse than inaction on her part, on her Thief's part.
Each Doctor had marked out territory in time and space that was unequivocally theirs in order to reduce incidents of crossing one's own timeline. For all of the other Doctors to whom that small section of the 21st century didn't belong, they would look at all points after and see that the problem had been sorted if they even saw a problem there at all. For the Doctor whose territory this year was in, it was generally up to him to sort something this large.
The thing was...The thing was, despite the almost cheerful facade he showed to the universe, the Doctor was broken. He was piecing himself back together piece by piece, but it was a slow and difficult process that was taking years, years that were being marked by the orbital rotation of the outermost planet of the Sol system. If he received another blow, such as the one the 456 would cause, he would break completely.
A broken Doctor who was ready to die and willing to take the entire Universe with him in order to prevent all of the pain and destruction he saw who was in possession of a vehicle that could take him anywhere in space and time and was unable to deny him when he asked directly was a dangerous thing. Since she couldn't deny him when he asked, she would deny him before he asked.
When her Thief sprang anew from the ashes of the old, he would learn of this incident and how it was sorted and his eyes would darken as he added the weight of this incident to the burden he carried, but not having been there, he would not break completely.
Sighing to herself, she turned herself towards Mars and Bowie Base One. Better a little breakdown than a major one.