Before Anson's death, the two were violently antagonistic. Because of his hatred for Stanley, Ansom naturally hated and despised Stanley's closest followers, including Wanda. Wanda was not only slaughtering Jetstone troops whom he badly wanted to defend, she was also defacing Jetstone's corpses, and using them to croak even more of his followers. Wanda considered Ansom to have stolen something from her that was of even greater value than the Jetstone troops she'd croaked. She may have been referring to the Arkenpliers or to Jillian or to both.
After Ansom's decryption, Ansom feels a deep love for Wanda, and hopes to gain her love in return. He resents the fact that Wanda frequently seeks Parson's advice, in part because he wants to show Wanda that she doesn't need any Warlord except him. Wanda took great pride in her ability to decrypt Ansom, and currently regards him as a very useful and loyal servant. She understands that both Parson and Ansom are talented Warlords, and tries to make the best use she can of both of their respective talents. In the final analysis, though, she feels she can make her own decisions, and so doesn't completely rely on either Parson or Ansom.
After finally being forced to accept that Jillian loves Ansom more than her, Wanda and Ansom's relationship has become tense.