My virgin sister-in-law, who was super kind and a slut, felt sorry for me, showing all my virginity, and decided to give me sex practice with the absolute condition of using a condom! When we used an old condom, it broke and led to an accidental sex! Then my sister-in-law, who said 'You can't feel good as a virgin,' drooled so much that she looked like a puddle and had continuous explosive orgasms! After that, she had a convulsive butterfly climax when I came inside her! She turned into a lewd woman who insisted on coming inside her during the second round!