Ruth is pissed as fuck because of how the Byrdes treat her. She is pissed for what they did to Ben. And she is pissed for what happened to her Daddy.
I think Ruth is really pissed at Wendy... if you go all the way back ... Wendy and her always had issues and the shit with her dad last season never went away.. I do think that Ruth seed Marti as the father she never had and Marti sees her like a daughter even though she isn’t.. I don’t think she will come after Marti and the kids but I can definitely see the shit against Wendy ending in a Major confrontation. That Wolf-Bitch comment had all kinds of Venom behind it.