Within Her Magic by N Dune

Merissa
My time in the shadows has come to an end. It’s time to stand up and fight.
After the brutal murder of her parents and being forced to leave her beloved sister behind, Merissa has been single-minded in her mission—learn to control her magic and become a more powerful witch in order to return to the wolves’ territory and free her sister.

Kayden
My wolf grows restless with his need to protect and claim her.
Four years ago, on the day of his brother’s wedding, Kayden met his fated mate and vowed to keep her safe and out of his father’s clutches. Now she is no longer the young, inexperienced witch he let go and tried to protect. She is a warrior, a force to be reckoned with, and he intends to claim her.