Her Hungers, by Mary Winter. The price shows as $5.70, but when you click on Buy Now, you should see the discount for the 12 Days of Christmas sale. Available as many formats: Mobipocket, Microsoft Reader, HTML, Adobe Acrobat, Epub; you can purchase more than one and get the discount each time.
As with all of All Romance's books, I'd guess it is fairly explicit, given the "heat index" of 5 for this one, and the content warning below.
Book Description
Lilah knew werewolves. Growing up as a human in the Northwoods Pack territory, Lilah also knew Roarke Connelly. But a human would never be good enough to love a werewolf, and broken-hearted, Lilah left the Northwoods vowing never to come back.If you sign up for the Wildfire newsletter when you create your account, you'll get an email each day to remind you about the free book of the day.
And she kept her promise, until a vampire turned her and she needed, one more time, to see her home. A brutal attack there left her wounded and infected with lycanthropy. She became a werepyre, both vampire and werewolf and hated by both species.
Under the protection of Adrian Fitzreal, brother to the vampire who turned her, Lilah knows he’ll never be the Alpha, her wolf, and she, craves. But she accepts, because with Adrian’s help, she’s staying alive, which is all a werepyre can ask for.
Until Roarke shows up. He’s got trouble at home. A rogue group of werewolves known as the Dark Moon Dogs wants to take over his pack. But when he finds out Lilah was attacked in his territory, he goes to find out why.
And discovers that she’s no longer the teenage girl who hero-worshipped him. She’s a grown woman, with a woman’s needs and two beasts raging inside her. And right now, they hunger for her Alpha, and for her vampire.
Warning: This book contains scenes of M/F/M sex and sex while in shifted form.