Miss Kirsch had told her parents that she did not want to do the course that they wanted and her mother was cool with it, but her father came to her later and scolded hr talking about how she is a child and that she did not know what she wanted. She realised that her father was managing and dictating her life and this pissed her off and she decided to show him just how much of a child she id not by pissing in his mouth and having him eat her out