depends on which scene was the last you had, check the sewers first from the dock area, over in the top right sewer entrance at the docks, she has an offshoot in the sewers that lead to where she stays, if she isn't there, try sleeping in the inn a few more days to see if she ambushes you in the night again. Otherwise, you might have reached the current end of the story line in regards to her.
no worries, myself, I am impatiently waiting for the version where there is repeatable orders to have the girls do things. Anyways, if you have had a few rounds of intercourse with her, I think there's a gallery like area that shows all reached sexual interactions with the girls if you interact with a sort of mannequin thing. it's the memory room which is reachable with main pause menu.