First Dropped Book?!

Can you believe it? I actually dropped a book - not in the physical aspect of a book slipping from my hands. So, my last book review was of a book about double twincest and the relationship between the four. It just so happened that there was a second one and although I wasn't particularly interested in exploring the ... unique dynamics of their relationships, the synopsis had me buy it.
Warning: Spoiler Alert!

And I was thoroughly disappointed that I dropped the book about half way when I realized the book wasn't going to go along the ways that I had hoped, instead following the route that the previous book had.

If you read my review on it, you know that in My Brother's Lover, Evan, Brennan, Luka, and Alek have an inclusive relationship between the four of them. It's a pretty much free-for-all. Now here is the part of the synopsis that got me to buy the second book - "The young men's relationships to each other begin to unravel as carefully drawn boundary lines are blurred and crossed. The four must question the nature of their commitments to each other, what they want, and what to say to those relentlessly demanding the truth. When the most dangerous thing you can do is admit to who you love, and jealous is a luxury you can no longer afford, brutal honesty is the only remaining key to salvation... or damnation."

Now, I also read a few short reviews on it before buying it, not much to spoil the read but just to give me enough pushing power to tip me over the fence. From what I read, Evan is critically injured during his attempt to stop a homophobic attack on a man. A few months pass, and while Evan is healing, he is slowly sinking into depression because Alek (his boyfriend) and Brennan (his twin brother and also his lover) refuse to touch him and treats him as something fragile, just waiting to break. But Luka (Brennan's boyfriend and Alek's twin brother / lover) comes to the rescue and sweeps him off his feet, thus falling in love with Evan, thus making their relationships that much more complicated.

I was really hoping that in this book, their relationships were finally going to be defined, boundaries and all. I found myself loving the Evan-Luka dynamic almost more so than I did Evan-Alek in the first book. But that didn't happen. Luka and Evan confess their deeds and although it strains the relationships between the four for awhile, it eventually leads to Alek and Brennan sleeping together for a little payback, Brennan and Evan sleeping together, Luka and Alek sleeping together... Just a whole bunch of sex between different pairings and sometimes even threesomes and foursomes...  At the end (yes, I skipped to the end), they did end up setting up some rules as to how to go about their relationship but I just can't buy it... It ended up Alek-Evan & Luka-Brennan, but they can sleep with any other person as long as they tell their respective partner of the deed? That just... sits wrong with me on so many levels. Don't get me wrong, I enjoy the fantasy of two brothers doing it, them being twins is a plus. But I like exclusiveness and that isn't what I get from this book. So although it was hot and raunchy, I just couldn't finish it, nor will I be picking up the third installment (I heard rumors there was going to be another to conclude the twins' story).