Watching it again...I still really hate the ring part
Where Everett asks his mom for the ring (the one she promised to give him) and her reaction was tough *beep* The part that I hate specifically is when she goes on to say, "I know you're disappointed, but think of how I feel." What a selfish, stuck-up bitch.
No one took the time to attempt to get to know Meredith, they just followed what Amy said and treated her horribly. You can totally see how uncomfortable Meredith is with being there and the family just made it worse!
Also, seriously? What kind of sister would be okay with stealing her sister's boyfriend/almost fiance? Connection or not, that's wrong and there's no way you wouldn't feel guilty for doing something like that.