Forced Incest Brother/Sister Slave Femdom?

[GrynningIsaac]

I'm looking for a story that I remember being about a Latina dominatrix that captured people and put them into an underground prison she had wired up with cameras. I remember the main plotline being about a brother and sister duo that were captured by her doing incestuous things but the last story in the series opened with the dominatrix being eaten out by one slave and then her man-butler Vlad(?) going behind the slave at her pussy and fucking her from behind.
I remember the dominatrix saying something about how "She would have to put slave away because Vlad was getting too attached to her."