I don't think it is "open-ended". They explicitly said multiple times that the drug trial wasn't working for him, so he knew he was going to die. And he didn't want to affect her any more than he already had.
Kai Lucas Zachary
2025-02-04 15:00:11 +0000 UTC
For some reason, my memory had the death happen so much sooner, not more than halfway through the movie. I kept anticipating it far sooner than it actually happened, which is somewhat ironic in itself.