I drew this with some of the details from my post on Jan 12th of Revisiting the Lesbian Fantasy in mind.
In this fantasy scenario I was envisioning a Domme with two subs, one female and one male. The femsub outranks the male sub and receives preferential treatment. Her role is more of a nymphette sex kitten to the Domme while the male sub takes care of the tedious chores and receives the harshest beatings. If the Domme uses the male sub sexually it's either for cunnilingus or strap-on play.
Their behavior is rewarded differently. Based on the femsub's performance she will be allowed more or fewer orgasms per day. Based on the male sub's performance he will have more or fewer days until his next chastity release.
The Domme keeps them in "matching" maid's uniforms, with the male sub's uniform having adjustments to increase humiliation.