Disclaimer: I do not own any part of the Avengers/Thor franchise. I was uncertain where to put this, as it primarily deals with a character from Thor but references parts of the Avengers movie, if only peripherally, and is part of an in-progress larger story that deals primarily with the Avengers. So.
Fandral is a rake. He flirts and plays with hearts and, if flirting bears fruit and the lady seems the type to not look too deeply into a tumble, mayhap spends the night in beds not his own. Ever he is gone by the next morning, though, sparing both parties that awkwardness.
The one bed he would spend the night in and never leave is forbidden him. Its owner wants him not, and so he will spend his days... elsewhere.
One day, brief hope. A young, fair mortal who bears a decent resemblance, possesses the same quick tongue despite her inexperience with flyting and inability to pronounce some things. The fundamentals are there. Briefly, ever so briefly, Fandral may hope that he has found someone to soothe his ache, and he thinks on her while Asgard is set to rights, even if his love is in every stone and smooth wall of the palace.
Then, a return to Midgard. The discovery that she is his heart's intended's child, born with a mortal some years ago. Fandral had never suspected, none of them had, simply assumed Loki was doing research or spellwork or some such and secluded himself, as Loki was wont to do. And now, the thought of his proposed balm stabs like betrayal.
He will say nothing. The child's father yet lives, Loki's madness has not yet been lifted, and even if he possessed the sanity of the mountain's bones Loki would not accept him. He has waited far too long, or not long enough.
Fandral will say nothing, and jest, and flirt meaninglessly, and spend the night in beds not his own.
In his dreams, dancing green eyes and raven hair and wide grins with too many teeth will haunt and mess his sheets.