setib is right. Scenes like that are very much optional with VERY clear choices.
Most other naughty scenes can be skipped entirely or made milder/wilder depending on what floats your boat.
c'est sûrement chipoté pour des détails, I don't know what you want to do in the future with her, but maybe the "sharing" alone may mislead some people (with only one people, or one by one), and maybe write "sharing/gangbang" would be better, if it don't take that much time to rewrite, and if there will be other gangbang...