The Sons of Tallav, is set in a sector of Federation space far off the beaten path. Shane and Maon are Tallavan marshals, tasked with keeping the peace. Rand tried a brief stint as a marshal. Now he runs a BDSM club on another planet.
Each must come to terms with the matriarchal system of their home planet, Tallav. Tricky because each is heavily involved in the BDSM lifestyle.
Book one is her Dom, book two is her male submissive, and book three, just released in July 2018, is her sexual sadist.