-Elrond paints a vivid picture of what Arwen may expect with a marriage to her Aragorn... and THAT'S if he lives to become King!-
spoiler: this is what really happens.....
-(After Aragorn and Arwen marry, he reigns with her at his side for 120 years, then he decides it's time for him to pass on; their son, Eldarion becomes King. Arwen said farewell to Eldarion, and to her daughters.. and passed away to the land of Lorien... alone until winter came....When the mallorn-leaves were falling, but spring had not yet come, she laid herself to rest upon Cerin Amroth; and there is her green grave, until the world is changed, and all the days of her life are utterly forgotten by men that come after....)-