Also, he could probably raise her corpse in an emergency, even at sea. But he wouldn't have liked that suggestion either if she'd made it ahead of time.
But here she was, alone in the middle of the ocean—well, not really the middle, but close enough as to make no difference. And...there was a rowboat off in the distance. Not her boat, more was the pity, but certainly a boat, and maybe that boat would contain someone who could get her back to shore and away from potential boat-eating sea beasts.