Midlife at Midsummer by Victoria Danann

Rita Hayworth transitioned from underappreciated insurance adjuster and underappreciated wife to the most powerful figure in the magic world. The job came with perks. Guaranteed health, a dream home, wonderful neighbors, magical dogs, and a sexy soul mate who’s also a legendary relative of the fae. So what’s wrong with that? Keir has a burning desire for a formal commitment, but Rita’s been burned by love before.
When she finally makes a decision and agrees to let the vampire officiate, it seems happily ever after is at the next stoplight. But wait. This is Rita. It can’t be that easy because, for one thing, Loki just can’t seem to leave her alone.