This is serious stuff, your D has misled you both about her situation. Where are the school conferences? When you asked your D did you ask to see, be involved in her catch up, look at her schedule, praise or discuss Progress? Did you get invested?
Your child is struggling and you were unaware?
Stopping her going to her friends party appears to be punishment to me. Closing the door after the horse has bolted. This is a wonderful opportunity to show care, love involvement and true interest. Fantastic dad and D time. This is a case to show love and mutual respect. To get to know and understand your D. To validate and listen, to put together an action plan to tackle this together with feedback.
I see a pattern in this, 25 posted some amazing posts at the start of your last thread about the passive aggressive umbrella incident and punishment with regard to the advance payment on the house. Comments about protecting from consequences, I think you might choose to reread and see if you have a pattern.
If you want to enforce consequences then boundaries are set and then enforcement occurs.
Those are my thoughts, although there are parents here who can help you with strategy on this. It is a long time since I fostered teenagers.
I think you need a proper plan.
V
Freedom is just another word for nothing left to loose. V 64, WAW