I believe you are looking for "Sunset Love" by Aurora Nyte, which can be found here:

http://www.dokuga.com/fanfiction/story/124/1

This story is rated MA, NO YIMs!!

Enjoy!

~~Wiccan~~

I've been looking for a fic where Kagome's Father is from the past. He know's Sesshoumaru, too. I don't clearly remember it but in that fic, Kagome and her father met but didn't realize their relationship yet until Kagome's Father noticed her necklace? I believe he is a youkai, too? Not Sota's father, though. I think her mom might have remarried? She had to help Sesshomaru; he was chained up in a cave? lost in his beast state, and Kagome willingly let Sesshomaru's beast take her fiercely in order to save him, from what and why he became that way, I do not remember. Her father didn't know Kagome's his daughter yet so he allowed that to happen though unhappily.

Sunset Love by AuroraNyte (Rated MA, no YIMs) [Complete]
The sun sets even as the crescent moon rises to greet his eternal love. Her mother's words a prophecy that has set Kagome's feet on the path of destiny once more.
www.fanfiction.net/s/2370317/1/Sunset-Love

Thank you so much, I will check it out.
......

Yes, that's the one. Finally! Thank you!