I remember reading it ages ago but I can't remember the name of it.

This is all that I can remember though:

Kagome finds Sesshomaru in a tree, like actually inside the tree, and I think she visits him a few times and then they have sex, and when she goes back to see him again, the tree won't let her in. Her mum had warned her about not going to see him and later we find out that Kagomes mum had gone into the tree and fallen for him, and it was hinted that Kagome might have actually been the daughter of Sesshomaru.

It's a weird one, I know, but it was a pretty amazing story

Oh and it's a one-shot!

Iiiii remember this too. It was very fairytale-esque with lots of flowery language and internal monologuing, iirc. 90% certain it's on Spark.

Yeah it was pretty fairytale-ish, I'll go look over at Spark but I think I might have read it on deviantArt

DeviantArt, huh? You can search for keywords there... it's worth a shot.

Was the lemon implied or explicit? I just did a check through the Spark archives for 1-chapter NC-17 fics and didn't see anything like that... but I might have been searching too specifically.

I'm pretty sure it was explicit, 'cause it had the warning thing on it. I've been searching since I started this thread but I still can't find it : I'll have to continue looking tomorrow, it's 2 in the morning in Melbourne.
Thank you for the help Jupe!

Dear Lilly,

If you find this story, I would LOVE a link to it!
<3
Thanks!

Luvers,
'Gome :3

I think you are talking about Forbidden by DaiyoukaiGeisha

That is exactly the one I was thinking of, and probably the one the poster was thinking of too! Thanks Bright!

Yep, that's the one! Thank you :3