How do you prevent other family members sending invitations to install Bitdefender?

Arowland

I have just purchased a Bitdefender Family subscription and sent an invitation to my daughter to install the product. It is my name that appears at the top of her Dashboard. I have password protected the interfaced to stop her turning things off etc and she doesn't know either that password nor my account password.

However, it appears there is nothing to stop her sending invitations to her friends to install BD and use up all my licences. How can this be prevented?

I do not need to use parental controls -- she's too old for that.