This won't be a long one.

Meeting went well, surprisingly civil.

I'm not gunna give the reasons, but the lack of key and over reaction had valid reasons.

Daughters friend is allowed back over, they apologised for their comment, but we've agreed that I will not intervene with things involving periods/personal stuff again. Numbers have been exchanges so I can contact either one of them in any situations needed. Daughter and her friend both happy with the resolution

Sorry I'm not able to say more, not my place

Thank you everyone for your comments on this, don't think this throwaway will need any more