Yes, you can bring persons, if you think it will help you relax.
The shooting is not a social party.
Taking care of children and friends is an additional burden for the model.
A shooting is really hard work for everyone involved.
The model is the star and everything revolves around her. So much attention and unusual situation are demanding. It should therefore be made as easy as possible for the woman.
A single accompaniment is more effective.
Often the partner or a male acquaintance is not really helpful for a single shoot. The woman is most tense because she wants to be beautiful for her partner at every moment.
It’s different with a friend, there she can do nonsense, relax and is more willing to experiment.
The girlfriend can also get used to the situation more easily and is more helpful.