"Great was the sorrow of Eärendil and Elwing for the ruin of the havens of Sirion, and the captivity of their sons, and they feared that they would be slain; but it was not so. For Maglor took pity upon Elros and Elrond, and he cherished them, and love grew after between them, as little might be thought; but Maglor's heart was sick and weary with the burden of the dreadful oath."
(J.R.R. Tolkien "Silmarillion")
How did know Elros and Elrond the truth? Perhaps they accidentally heard the Noldolante.
On the wall some drawing from their childhood, and the lines on the jamb show, how much they grew during the years.
This is my entry for the Between the Lines contes. ([link]