To take up a more on-topic subject: The situation around Abby, Lilly and Frank.
Someone has already written a relatively good overview of the situation here, but I have to disagree on one point. Abby. She was compared to Shannon in the post in question, if I'm not mistaken.
Abby is not fully aware of the feelings Lilly has for Frank. She knows Lilly is opening up to him (and not just herself, but her clothes), but doesn't assume it's more than overcompensating. This makes sense because a few weeks ago she (Lilly) absolutely couldn't stand Frank. At the same time, I think her reaction to Lilly's feelings for her stems from the fact that she (Abby) has no romantic experience. We don't know all the interactions between Abby and Lilly in the past, but I think there will have been enough banter between them in the past that Abby just dismissed it as another joke. I see more of a softer dynamic between the two here like between Lilly and Becca. Except Abby is more actively building Lilly up and supporting her. Which of course doesn't mean that Abby doesn't reprimand Lilly when she (Lilly) crosses a line. The black eye incident is an example of this. Even Frank was surprised or shocked that Abby managed to make Lilly as meek as only Shannon had managed to do. But I don't see a scenario where Abby would deliberately hurt Lilly emotionally to take advantage of her, like Shannon does.
I think the culprits in the situation, although I actually like them, are Lilly and Frank in particular.
They both know about Abby's feelings for Frank but shy away from confronting those feelings. I understand that Frank, who has spent almost 20 years raising Abby as his own flesh and blood (or better, if we take Lilly and her father as a comparison), is reluctant to act on the feelings, but I think setting Lilly up with Abby, then giving Lilly tips on how to keep Abby's drive going and still have something going on with each other on the side, without Abby knowing the slightest thing about it is a pretty low level and I would totally understand if she felt betrayed by them, especially as Lilly and Frank are the two most important people in her life.
But I agree with the statement that this situation will escalate sooner or later and it will come to blows. Abby will then have every right to be angry with both of them.
I see a certain parallel here with Lilly's ex-boyfriend's infidelity. But we can be sure that Becca has anticipated such a development, she has known Lilly all her life and knows how hesitant Frank is about Abby.