I'd love to see a story that covered a dominated family situation, with the domination accompanied by love and caring, not brutality. By dominated family, I tend to mean the fantasy of parents dominated by their adult offspring, or the entire family dominated by a son- or daughter-in-law, along those lines.
A favorite story idea I'd love to see fleshed out is a typical, loving family, Mom, Dad, and some adult (or LATE teen) kids, gradually and at least somewhat willingly brought under the firm loving control of a friend of the kids, or a husband or wife of the kids, with a lot of loving humiliation and discipline, but without brutality or bloodshed or snuff elements. Mom and Dad end up serving everyone, the whole family serve the dom.