Interesting parallels between the Snells and the Byrds. For both, the female turns out to be the most ruthless and the one truly in control, despite the husbands' illusions they're the ones in charge.
The cartel, and Wendy, made a huge mistake this episode. Yes, Ruth's dad needed to be taken out. He was never going to stay away for good, and his influence over Ruth was just too ingrained for her to ever truly be free of him. The smart play would have been to take him out quietly and without a trace. Ruth knew he was being paid off and would not have suspected anything when he vanished. Even if she eventually suspected, there would be no proof and Marty could honestly deny any accusation. Instead, they've given her a reason to be angry and vengeful just as she's been granted access and control of all of Marty's money and his businesses. That won't end well. They've underestimated her. Stupid.
I wish they'd devoted more attention to the Ruth/Marty relationship. I think it's the most interesting one on the show, with dynamics similar to Rick/Daryl/Merle on The Walking Dead. Marty treats her like an adult and recognizes her abilities, but at the same time, he can be annoyingly abrupt and dismissive of her, just at the moments she needs the most reassurance. Unless I missed it, they told us he would be teaching her how to manage the books this season without ever showing us. I would have liked to see more of that.
I wish I liked the daughter more, as the moral compass of the show, but god she's annoying. Still, run Charlotte! Run far away!