Rick is only protecting his family, if Cora leaves for Argay, he will not protect Cora. Rick did not make an alliance with Argary, but he will pay Rick every month, this is what they agreed on. Cora also told Argary that if he accepts the offer (if Rick eliminates the Novellis, give Rick 50 thousand dollars, but if he eliminates all the mafia families so that everything goes to Argary, he will give Rick 100 thousand dollars and the same amount every month until something goes wrong.) what he gets from Rick, he can save the casino and the hotel. But if he does not accept Rick's offer, he will still take action because Cora is also in trouble, but then Argay will not be able to profit from the business, everything will go to Rick. If Cora leaves Rick for Argary, then someone from the family will be out, so they will not be on good terms.