She's as toxic as her orange haired husband

This is all she knows. She grew up in an abusive household and lived for several years with someone who's manipulated her for so long. It's likely a defense mechanism she's put up, especially since she now is concerned that her boss could fire her since she's taken. She wants to live with taeha but if she loses that job, she can't make nearly enough to save and qualify to rent an apartment.
This is a way of protection to her. Even if it's something others may not understand.