I'm all for dominant/submissive erotica, or werewolf erotica, or menage. I've read a lot of really good stuff in those genres (Maya Banks, Lora Leigh should be checked out), but this was not among them.
There's being dominant, and then there's just being a jerk. The two male leads, JD and Caleb, definitely fall into the latter. Basically, JD runs into "feisty" heroine Samantha, bullies her around a little (in all seriousness, it was a while before I realized that this was actually not an introduction to the villain of the book) then realizes that she is his mate. Then he starts producing a musk that basically overrules all of her very well-founded dislike of him, and within five minutes (literally) they are having sex against his car. He tosses her into his car, drives her home, and there he and his twin brother proceed to screw her left right and sideways for the entire weekend. Once they've chained her to the bed and left for work on Monday morning, the musk (which has worked to get her hot, bothered, and completely pliant) wears off and she runs.
See, here's the part where I think that Jenny Penn expected me to be all, "That idiot, why run from two such awesome studs!" when actually I was still a little grossed out that over the course of this weekend, neither had actually stopped humping long enough to tell the heroine HIS FIRST NAME. And then there was a lot of whining about being in love with the heroine, but it still left the problem that they hadn't exactly been engaging in really any conversation. And the entire fixation on her comes from the fact that she can give birth to their children -- but there was very little actual recognition of her as a person that it stopped being sexy very quickly, and mostly just became unfortunate.
Here's the thing -- Lora Leigh has an entire series (The Breeds) based around the concept of an overwhelming physical draw, requiring sex, between two strangers. But it's more then just continuous sex -- they also talk, share who they are as people, and eventually fall in love. I'm not saying that all erotica needs a romantic element (I've read plenty of good stuff that doesn't have it, or even want it), but if Penn wants to write romantic erotica, then there needs to be more to it. As it was, I really wanted poor Samantha to get a restraining order. I also got excessively tired of the Neanderthal male leads barking things like, "Woman! How dare you defy me!" I mean, good grief. Bottom line -- better stuff out there.