Board Thread:Skyrim/@comment-107.219.133.18-20130707180256/@comment-11425537-20130707200025

Gallus and her seem pretty intent on enjoying each other's afterlife company once Karliah's contract is filled.

If for some reason that's not the case, then like AK said, she hadn't gotten over Gallus when you became a nightingale, chances are, she's not going to get over him any time soon.