help me find this ;-;

It's been on my mind the last few days and I feel like I'm going insane.

I may not remember the details correctly since it's been *years* but it's a story about a depressed wife that ends up sleeping with a coworker(?) that's an assassin(?). I think it ends with either her finding a new love for her husband and she ends up dying, can't remember if one was a fever dream.