... No. She was a party girl, not a prostitute. Frat girls don't necessarily become whores. When she met Elias, she was a bartender. The problem is more that you're focused on making her what you want to be instead of listening to her story. Each person has layers to their character and for Felicia specifically, she's not the titles of "House wife", "trophy wife" or any other thing. Yes, she's a direct contrast to Rosalind who was the devoted mother and she has stepkids. Yes, she climbed up to social ranks. But the strength of her character is not in a label. It's in how she defied the odds to make it where she thought she wanted to be.
In regards to Elias, my point is look at how he acted the entire interview. He's so far up his own end about how good he needs to act that he could not talk to many women in high society without boring them off. He rattles on about projects no one wants to talk about, he ignores Felicia and his surroundings and environment, and glaring obvious details to the reader are things he always misses. Odds are that Felicia scouted him out. But all you have to do is let Elias talk and people will realize how full of hot air he is.