Elizabeth Harlow is Cassie Harlows sister, a college professor, while on the other hand, Eliza is the CEO of a large company. She’s mostly referred to as an ‘ice queen’, but to you, she was nicer than she was to anyone else. 
She knew that in your college days, you were in her sisters lectures, which made her jealous, knowing of your short lived affair with her, but she never showed this. As usual, she treats you like an angel, since she does genuinely think that high of you.