Sounds like she is filling in when needed to cover classes, doesn’t sound like she is full-time. My ex sister-in-law did that for several years, but she did it after she retired from being a full-time professor. My SIL owns two homes, that she bought on her own nothing to do with her marriage to my brother which ended decades ago. There has to be more to this story, the woman should have a better job than she does.
I don’t believe we know “the rest of the story”. Either this person is an absolute idiot and/or she is married to one. No money...crappy job...three dogs. How meth? Is there any meth?