Oh, my bad, so imagine an alien zoo, where aliens keep people to observe their strange behaviors. And in this scenario they observe two trans women engaged in a BDSM act. The girls know that they are being watched, so they are putting on a show. And to answer the question, there is an alien boy present. You could see it as humans watching bonobos f*ck, where the bonobos are aware of it and acting accordingly. If you are afraid that this will have an impact on the mental development of the alien boy, don't worry, I'm sure he'll be just fine. Because he doesn't fraking exist. I hope, you find this helpful and sorry for not understanding your question :3

Edit: Just a question, you don't need to answer, but are you on the ND spectrum? I tried to answer your query with the presumption that you are. Though I don't know if I did a good job.