Poisons and Princes — Kristin D. Van Risseghem

MISTRUST. MISTAKES. MISERY.
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Finnegan knew their love was doomed from the start. But he can't seem to let Sidelle go.
Some things can't be forgiven. Winter and summer are trapped in a forbidden romance with no escape. For Finnegan and Sidelle, it seemed their unlikely meeting was destiny -- until their bond is discovered and the couple is torn apart.

Finnegan longs to find Sidelle and beg for redemption, but his mother is determined to keep him imprisoned forever. A stranger befriends Finnegan, offering him the chance to have everything he's ever wanted -- at great cost, for Finnegan will have to become his darkest nightmares.

And someone who Sidelle may never believe in again.