Confirmed: NO NTR planned.
You may wish to clarify this where you have planned tags.
I would also suggest clarifying similar things that people who hate ntr tend to also hate, like sharing, swining, mmf threesome (cause you have group sex planned), voyeurism (the watching people have sex kind) etc. (sharing and swinging kinda cover MMF though).
And whether or not they are optional if you do have them.
Optional for a specific ending, but cannon in the next ep isn't truly optional btw.
To put it another way anything that is treated as cannon later on isn't optional, although that is only a concern if you have things that the audience you are going for would want to be optional.