Today, when I went to my sister’s house, I found a surprise. My two grandchildren were having sex. They are actually half siblings, but this was still a problem. They begged me not to say anything. But I couldn’t miss the chance to blackmail them. I also wanted to have sex, so I used the situation to my advantage. They had to please me if they didn’t want me to say something. So, I asked them to do a threesome to keep the secret. Both of them were really surprised by my proposal, but they immediately started to fulfill my wishes. Threesome with young people is much better, you can do whatever you want with them and they have more energy. So that I can have hours of sex.