Heather Petersen from Invasion! is still part of the current Lit-verse, as a crewmember of U.S.S. Everett.
A character from Time's Enemy reappeared in DTI: Watching the Clock, and its events were alluded to therein. The Furies were referenced in SCE: Ring Around the Sky.
Characters can exist in multiple timelines, so I have no problem with the idea that Heather Peterson has a counterpart.
I did not know they were referenced in SCE, though.