Looking for a story about a bi guy getting cucked against his will

Hello all,
Im seeking to find a story I read several years ago. I lost it when my laptop died.

The story starts at a fair/cattle auction/rodeo type scene where a married bi man meets up with a drifter/ranch hand type. They have sex at the scene and also in the pickup on the way to the mans ranch/farm. He tells his wife that he hired the guy to help him with farm work but of course, the drifter is fucking the bi guy whenever he can. The bi guy then finds out the drifter has seduced his wife and is fucking her. He doesnt like it, but cant do much about it. The drifter basically kind of takes over.... the ending of the story is a bit dark. The bi guy comes home to find the police/sheriff at his home. He goes inside and meets the police. Im a bit fuzzy about this part. I think the wife shoots the drifter when she catches him fucking their teenaged ***. I think both the *** and drifter are killed but Im not sure. I have forgotten the ending and maybe the wife kills herself when she finds out she has killed her ***. It may be the *** that shoots the ****** when he catches her being fucked by the drifter.

Does anyone know anyting about it? I forgot where I read it.. I think it was Asstr but that site is so difficult to use now that I cant find anything. Id appreciate any help. Thank you!