I just think that if you are saying she is not able to babysit because of a particular incident, then this should have been mentioned to her at the time. 3months is a LONG time in the world of a teenager.

I agree you have a right to be upset and untrusting of your DSD, but you can decide to suddenly extend/create a punishment for something that happened 3 months ago.

If I made a mistake / done something wrong at work, and I was told immediately what the consequences were - fair enough, I would cop it on the chin. If however three months down the track my boss suddenly decided to slap another punishment down and tell me that it was because of what happened three months ago - I would not be happy....