That woman is sick in the head. Not because she likes rats, but rather, she lost all sense of perspective and is living in an alternate reality with the rats. She said that when she'll go to heaven, there will be lots of rats and it will be heavenly.
I almost felt bad watching the show last night, because I kept on feeling the urge to burst out laughing. This lady was so clearly out of touch with reality, the emotion that showed on her face when she was talking about her rats cracked me up. Her poor son. I don't know how old he is, but as soon as I could I would hightail it out of that woman's life. Can you imagine the self-esteem boost he gets from hearing "I love rats more than people." Raggedy Robin creeped me out, and it was hilarious watching the neighbors get creeped out by her. She and her husband were sweet people though, and not harming anyone (well, except their son who seemed to get the humor of the situation). But if I never saw rat lady and her brood again, it would be too soon.