Oathbreaker — Kristine Kathryn Rusch

Nils wants nothing to do with his family or their magic. He hopes for nothing more than to live a normal life. Kasey offers him that life, but more importantly, she offers him love.

When Nils' father warns him against marriage, Nils refuses to listen.
He vows to fight his destiny and win. But at what cost?
Part of Warlocks, an Uncollected Anthology.