In Fox and Coyote and Whale when Fox discovers that his wife is in love with Whale Fox begins to treat her this way?

Fox begins to treat his wife with the same level of respect as a used tissue. He's not about to stick around for that kind of drama – he's got better things to do, like chase his own tail. So, he gives his wife the boot and moves on to find someone who appreciates him for the cunning creature he is.