T'was the Night Before Yule by Breon Briarwood. Aragorn's been working too much and Frodo doesn't want to be left alone the night before Yule. All these little ficlets will eventually become one bigger story.

What Frodo Knows by Breon Briarwood Frodo knows something that Aragorn doesn't!  In my little universe male hobbits becoming pregnant are not unheard of. Don't like it? Don't read it!

So Here We Are  by LilyBaggins .A series of vignettes. In Minas Tirith just after the quest, Frodo bears Aragorn's child.