Ohhh, fuck, I can feel you wanting to cum. Cum! Cum for me! Cum between my fucking ass!” That was all that it took. My cock shot forth several ropes...of cum. My delicious cum splashed all over the small of her back. It immediately began to slide down in between her cheeks. She moaned and shuddered as her climax took over her body. “Ohhh baby. Thank you for fucking my big, fat ass.” As I laid onto my back, my cum still dribbled out of the tip, she rolled on top of me and took my cock into her. “Hold my hand,” she said.I went over and sat beside her, l took her hand, l could see fear in her face.“You don’t have to do this,” l said, “we’re not forcing you.”“I want to,” she said, “just look at your mother, l want to experience what she’s getting.”“It’s okay David,” Karen said, “Buster will be very gentle.” She looked at Alice. “Do you want him to cum in you sweetheart, you don’t have to,” she said.“No, l want it all,” Alice replied, “I want his knot in me, l want to feel him shooting. " Thank you," I replied, trying hard not to yawn at the same time.Time was progressing an I still needed to organize dinner for my sister. I went to the bathroom for a pee and refreshed. Then I dressed again. I hobbled out to the kitchen and began to gather up all that I wanted for dinner.Dinner was about halfway ready when my sister arrived, and I introduced her to Kelvin. She eyed him warily, unsure what to make of him. She brightened when he offered her a glass of wine. Kelvin and Trudy. She was thinking about the tall blonde boy in her math class that had broad shoulders, a thin waist, and long powerful legs. She imagined that the blonde guy was on top of her thrusting his long, thick cock into her tight, wet pussy. Her fingers were busy stoking her clit, and finger fucking her tight hole. She could feel that she was close to orgasm, and she planned to masturbate over and over until she was exhausted. Her parents had gone to a meeting and that gave her hours to play with.