Factual error: The poem Isolde recites, John Donne's "The Good-Morrow", is a 17th-century work, which is centuries later than the movie's time period.
Tristan & Isolde (2006)
Ending / spoiler
Directed by: Kevin Reynolds
Starring: James Franco, Rufus Sewell, Sophia Myles, David O'Hara
Answer: Both or either. Basically what she's asking is, "Are you really mine and no one else's?"