Misein means to hate.
It does, but it can have other meanings depending on the context. In this case, I believe my interpretation is correct. It's similar to Michael Jackson's "I'm bad", where "bad" did not carry its primary meaning (although that primary meaning turned out also to be true). Similarly, my wife is "hot" because she's working in the garden outside and it's 95 degrees, or my wife is "hot" because she's in great shape and wearing an outfit that draws attention to her figure.