I don't like Avery at all. It was highly inappropiate for Avery to ask Summer to be in her wedding.
However, it might be that Summer said what she did, the way she did and agree to be in the wedding just to not hurt Avery's feelings.
On Wes US show, Summer asks Noah to help her get out of being Avery's maid of honor. Now, I am hoping she tells Noah that she can't be in this wedding due to her mother's feelings about this and that she feels she is being disloyal if she is in that wedding ect. We'll find out on Tues Canada time - Wes US what her real reason is.
Josh did say that the two have some major issues to get past one of which is family and he also said social stuff not sure what that means.
I just wish Summer would say to Nick and Avery, "I cannot be in your wedding because doing so would be disloyal to my mother. I did not say this before but this relationship is wrong and highly inapporiate. I will not be in the wedding nor will I be in attendance. I'm sorry."