the genre I guess is BDSM, although the story contains Incest, Non con sex, spanking, loving wives, humiliation, and other kinks.
The story line is a mother alone for the first time after her kids go to college discovers her desire to be dominated and humiliated. She seeks out a Master, but he takes advantage of her desires and enslaves her, her husband, and kids. The first six chapters have been posted if you want to take a peek.
See my profile the story title is "Jesse's Journey Down a Rabbit Hole"