Everything about this sentence indicates it was written, or very seriously edited by an articulate adult. I know many adults who do not write or speak this, "correctly". If the mom was behind this then the daughter may not even understand at the young age of 6 just how devious and wrong it was. But, give it time. Little children learn about values, ethics, and morals from their parents and close family members. I don't think she should have been able to go the concert. It would have been a good lesson for the girl to learn that because mommy lied and made up a false story to go to the concert, the honor was taken away.
The worse think that I know of that my my daughter ever did was steal a roll of string from her grandma and grandpa's house when she was 6. I found it when we got home and made her call him, tell him what she did and that she was sorry. That was so hard for her to do, and she cried the whole time. She felt horrible and shamed, and I let her feel those feelings. I made her give it back to him on our next visit. It was good for her. The whole time I told her that I love her very, very much, but that what she did was wrong.
Luckily she is 19 and I have never had to worry about what path she chose in life. She is and has always been a joy to spend time with(even through the teenage years, who woulda think it???) and an asset to all she touches. Maybe teaching values and morals at a young age really does go a long way. I don't know. But, I am one grateful mom

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Lion