point of destruction

when arguing with a parent, this is the point where the parent clearly knows that she has lost, and pulls her rank as an adult with a classic parent phrase, ie. "I will wash your mouth out with soap", "i said no. You dont need a reason why!". Once these phrases are said, it is clear the child has won the parents argument in their head, but will be beat because of their authority.

Dude, my mom was obviously at the point of destruction when we were arguing and she told me to go to my room!