I'm looking for a fic, I remember kagome got separated in a snow storm but was able to find shelter in a cave. Sesshoumaru stumbles in after being cursed by a woman who was trying to get him to mark her. So he's basically in heat. Kag and sess come to an agreement where she'll help him with his problem (lol); much steamy sex ensues. In the end they leave the cave and it turns out sess's dad was behind the whole thing. That's all I remember, any help would be much appreciated.

It sounds like it might by Not Impervious bu Oroyukae.

Rated MA

He was supposed to be the most powerful demon in existence; one that none could best in any situation, at any time. That was not entirely accurate, it would seem. One error in judgment at the most vulnerable of times, and all that he knows lay in jeopardy. Just what would said being be willing to agree to in the direst of circumstances?