This was a very good example of a proper prologue. We have a starting setup with enough interaction to get some relevant backstory, but not a wall of exposition. You get enough of a sense of the story to be interested in what happens next.
About the sex, btw. I don't know if I have ever seen an AVN that had thrust sounds that matched the animation. Might not seem like much, but it was noticeable. The glistening of the genitals and the lack of egregious clipping was also an extremely welcome detail.
I would say, though, that with all the quality I just mentioned, the dev might want to look into using more than just the music channel for the audio. There was a decided lack of sound when they were reacting to the doorbell or knocking which didn't really fit with some of the sound that existed for other elements.
The fact that those are my only real complaints speaks to how slick this first look was. I am looking forward to more of this one!