i've developed a very particular one that combines my netorare/cuck fetish with guro/necro: being forced to watch my gf/fiancee/wife be raped and murdered, and then her corpse raped again (and again, and again) by other men. i like to imagine the method of execution is decapitation or a high-caliber gunshot to the head so that her severed head or exposed brains can also be fucked. once they're done with her they dump her bloody, used-up head on my lap, and i may or may not use her myself, depending on my mood.

so yeah a very specific fetish, haven't really seen anything that really gets at it except this one single page out of a kubikiri doujin: https://hitomi.la/reader/2323611.html#6