Left alone with the girl, I offered to tie her up. She agreed. We sat on the stairs near the window. She obediently sat down on her knees in front of me. I tie her very tightly. It becomes uncomfortable for her to sit on her knees on a hard surface for a long time. She doesn’t tell about it, but sometimes she tries to change her pose: either stand a bit or change seat. These attempts look very sexy and exciting. I admire her appetizing forms, give her a cleave gag and continue tying her up. I tie one leg in front, and bring the other back and fix it by the foot directly to the neck. I tie her hair and pull it back, increasing her bend. I watch her sweet torment in this predicament bondage and leave her in it. The foot begins to tremble, she moans loudly. Due to the tightness of her neck, it is difficult for her to swallow and her breathing gradually becomes difficult. When she is almost exhausted from being in bondage, I untie her. The relief excites her so much. So relaxed and tender, she gives me a sweet blowjob right on her knees with her hands tied, and I cum in her mouth.