I can't remember much about it but I know it takes place in modern times and their are demons.
Sesshomaru is walking to his car in the parking lot of a building and he gets attacked by some human men. Kagome comes to his aid and kills the men. Kagome is wearing a spell to look like a human man. She calls sesshomarus father and he comes to help sesshomaru( who is injured) and sesshomarus father captures kagome.
After that I camt remember.
Please help.
Thank you!

This sounds like "Sesshoumaru Present" by Cindygirl. I think it was on Spark at one point, but I'm not able to find it there. I was however, able to find it on ff.net.

You can find it here: www.fanfiction.net/s/5443626/1/Sesshoumaru-Present

The story is rated M on ff.net, but it would be MA on Dokuga.

Thank you so much! This is exactly the story I was looking for!