Hi,
The story you're looking for is called: You stole my first kiss by Sesshomarus-Lover. The Author/Authoress is still on AFF.org but has taken this story down.
The story you're looking for is Muse by Yuri MoonFire.
Yuri MoonFire decided to take down all her stories from the sites she had posted them and place them on her own site:
Hope this helps you
The fic you're looking for is For the Love of His Son by lexjamandme.
http://www2.adult-fanfiction.org/forum/index.php/topic/24832-looking-for-fic/
Hope this helps you