Uniqueness?

Hello.
In fact, I and a few other friends are staying with a friend for Shabbat. During Shabbat itself, of course, we sleep in separate houses (there should be a vacant house in the settlement on Shabbat). For the preparations for Shabbat, I will likely have to arrive on Thursday evening and help with them. Her family is at home then, and also on Friday morning (what's more, we'll be out by then, and other people will arrive). I should note that this is a young woman who is a Torah scholar and fears God, and also that my house is very far from the settlement and I have no other place to sleep if I arrive in the settlement in the evening.
Is there a prohibition, or concern, about this? Is it problematic from another law, or perhaps for non-halakhic reasons? And is there a way to resolve this? (For example, if an additional person joins)
Thank you very much in advance.