I'm enjoying the series. I like some lightness and humor. Not that there isn't painful and depressing in the book, too.
I love the bond between the siblings. I loved Zan's "save yourself" bit after his thunderlust bit. And him showing up to help her out of her bad date was nice. Though the cover was not. Men/boys trying to control the love lives of the women/girls in their lives is not cute/sweet/protective or even funny (which is what I think they were going for). It's irritating, controlling, and sexist. Very glad he wasn't actually doing anything like that.
Forgive me if I missed it, but do we know why the twins are exiled?
The extension is good news; just hope they don't run out of story.