Alien Skies by Carmen Webster Buxton
Kamuhi Hailoaka’s desire to see other worlds led him to Wakanreo, the only world in the galaxy where the dominant species mates for life. Kamuhi met and married half-human, half-Wakanrean Yulayan Bellaire. After the Third Confederation of Planets rescued Yulayan from Inchauro Perduay, the man she found herself mated to, Kamuhi enlisted in ThreeCon. Now constrained by their rules and regulations, he and Yulayan work at being married and raising a child. Kamuhi has always excelled at academic subjects, but simultaneously navigating the pitfalls of bureaucracy, interspecies politics, marriage, and fatherhood at the same time is more of a challenge. Once he is assigned back to Wakanreo, the challenge becomes not only harder but more dangerous. For one thing, Inchauro Perduay still sees Yulayan as his mate.