Entitlement
I thought Jessica came off as entitled. I can understand her feelings of neglect, her mother didn't raise her and I can understand her bewilderment of the social boundaries. That being said, Jessica acted out in disgust when she realized her mother was a live in house keeper and felt herself entitled to the guest room. What she failed to realize was that her mom was indeed an employee getting paid. The family did not owe them the full use of their house amenities.
Also she was an adult, Jessica was not even entitled to her mom getting an apartment for her. She seemed very unappreciative. I was hoping there would be some sort 9f revelation like in the movie "Sarafina" where she realizes her mother's sacrifice and love for her. No, the daughter knowingly expects her mother to care fore Jorge,which was another missed opportunity for her to empathize with her mother's position. Jessica gets herself knocked up and expects others to take care of her child, without contributing financial support.
That being said, Barbara did indeed show her true colors. Draining the pool was absurd and showed her false superiority.