The next day...
"He did what!?"
The mistress was trying hard not to lash out, but after hearing the things Lashken said to her it was really tough not to allow her anger to get the better of her. She had sent Lashken to congratulate Ashton on getting his first class, but according to Lashken, Ashton immediately started berating him.
In his words he took all the insults Ashton threw at him, but when he started disrespecting her, he attacked Ashton and as a result got banned from ever entering the capital again.
Obviously, everything he said was a lie. The mistress had already informed him not to trigger Ashton. But Lashken intended to show off his worth by defeating her precious pawn. He did exactly the things mistress told him not to but he could not tell her that, so he decided it was best to manipulate the story in his favour.