I want to find the name of a porn DVD

The image is unrelated, just to exemplify.
I want to find a porn movie DVD that I have rented years ago, and I remember the plot, but I don't remember the title or the actors' looks.
The plot, as far as I remember, is like this: A family is leaving their house, and a maid is left behind to clean a bedroom. She finds a dildo in the bed and starts playing with herself using that dildo. Later, a woman from that family comes back home and finds the maid masturbating in the bed. She joins her and begins having lesbian sex. Then, a man related to that woman (I think it's the husband, but it could be her son) sees them having fun and joins the scene, making it a threesome.