Mistress Natalia gave her slave a technical chore but he did not do it. He did not know how to do it but instead of saying he was not able to do it, he told her he would and by the time she came home, he was still struggling to do it. She was pissed and spanked him hard as punishment. She spanked him painfully so as to make him stop agreeing to do things he knows he is not capable of doing.