Anna frowned for a moment. She knew she should back off but she was determined now. "You've taught me so much though. Won't you let me repay you?" she purred, crawling over to him and getting very close. Her eyes shone with pure lust. "I don't care if you're my uncle. No one will ever find out. It can be our little secret." she begged him, reaching her hand to gently feel his cock.