"If your twin wasn't in your world, maybe she's inside our world," said Thiltran.
Adhara eyes widened. "Absolutely! That's what I am thinking! You can help me, right?"
Thiltran nodded in response. "In one condition."
"Anything! I can do everything you want!"
The wolf with emerald eyes grinned and said, "Use your body to satisfy me."
ADHARA has no choice but to grant the desire of the wolf who can help her find her twin. She became a slave for the wolf desire and use her body to satisfy the lust of Thiltran. If that is the only way to find her twin, she will do everything.
She wanted to take revenge on the lycans who killed her parents. She wanted to see her twin and reunite as one.
And yes, she agrees to howl and moan like a wolf everytime she uses her body to satisfy the craves of the wolf with emerald's eyes.

"When love turns to despair, can a replacement fill the void?
Evan Hart's heart aches as he watches the man he secretly loves suffer from the disappearance of his fiancée who is also his older brother. It's even more painful because Evan knows the truth—His elder brother wasn't kidnapped; he ran off with someone else, abandoning everything.
Unable to bear the sight of Nathan Collins, the man he loves, falling apart, Evan makes a desperate and unthinkable decision: to become a substitute for his brother. What starts as an attempt to be close to Nathan quickly spirals into a tangled web of passion, possessiveness, and deception.
As Evan and Nathan's tabooed relationship strengthens, Evan's feelings are always in question. Will their love collapse under lies? What happens when his elder brother returns, and the truth comes to light? Who will Nathan choose? the man he felt he loved or the one who was there for him all along?
Come find out in The Substitute Desire."