The Sherman/Shwartz books have this storyline; the wedding comes in the first chapter of Vulcan's Heart
. Saavik subsequently becomes a sort of a Diane Duane heroine for operations inside the Romulan Star Empire. I don't know if she appears much in the novels beyond this - save for "flashback" style stories dealing with the movie era, I mean. Chronologically, her story seems to conclude in the 2370s in the Vulcan's Soul
books where she still deals with the Romulans.