Did Beth Know Jamie Was Adopted?

Speaking of Jamie's adoption, do Beth and Kayce know their brother isn't a biological Dutton? Jamie just found out himself, so it's hard to believe that his siblings would know the truth. However, Beth did tell her father that he would never love Jamie like he loves her and Kayce.

When did Beth Dutton Find out Jamie Dutton was adopted?

There are plenty of details to suggest that “Yellowstone's” smartest Dutton probably had some sort of idea that Jamie was adopted. However, the moment was not a part of the onscreen story. But Beth likely didn't know that Garrett Randall was Jamie's biological father until season four – after the attacks.

Does Beth tell her dad what Jamie did to her?

After showing him she has the evidence proving he was at least an unwitting accomplice in the attempt to wipe out the Dutton family, and shielded his biological father Garrett Randall (Will Patton) for setting up the hit, she tells Jamie she has set her affairs in order, so that she can kill him.