Once my parents divorced and it was just my mom, me and my sister, she made a deal with us.
"IF we told her the truth", she told us "she would not be mad. She may be disappointed, upset or hurt, but not mad."
We knew the rules, we knew how to behave etc.. But one day we were throwing the ball in the house and broke a beautiful covered, glass candy dish. We freaked out, because if our father was still living there, OMG, all hell would have broken out and we would be in huge trouble. Spankings, yelling, harassing comments.. It would be referred to over and over.
But when our mom came home we told her, "we have to tell you something bad that we did." She said ok, tell me.. That is when we told her about the broken candy dish and how we were sory and we promised never to do this again..
She calmly told us she was glad we had told her the truth, she was glad we learned our lesson , and trusted us to never so this again.. Then she said, to tell you the truth, I never liked that ugly thing, lets see if it something that can be fixed or needs to be thrown out!!!!
To this day, our mom has still kept her promise. She has never gotten mad at us, as long as we told her the truth, she has been disappointed or shocked, but we still tell her the truth, because we can trust her not to judge us, not to be mad.. etc.
I know this is a different way to parent, but it has worked for our daughter very well. She is like us, she is a pleaser and wants to do the right thing. When she has made bad choices, she admits it and moves on..