Immortality and the sons of Elrond

[PrinceOfTheHalflings]

Originally Posted by The Mouth of Sauron

Didn't Aragorn on his deathbed suggest to Arwen that she could "repent and go to the Havens" ?

This suggests that the children of Elrond could cross over the sea and retain immortality anytime during the Fourth Age or even beyond.

Yes, I was thinking this as well. The reason why Arwen rejects the possibility is because she made the choice to be mortal by marrying Aragorn.

As far as we know, Elladan and Elrohir didn't decide to marry mortals, so there was never any action on their part to indicate that they had decided to become Men - unless not leaving with Elrond is definitely the only requirement for them to become mortal.

Arwen had a reason for choosing to stay behind: Aragorn. She couldn't marry Aragorn and take him back to the Undying Lands, so she had to stay. What incentive could Elladan and Elrohir have had to stay behind if it automatically made them mortal?