Finally, I felt that I had had enough for the moment, and swam back to the side of the rocks, and climbed out. Cathy and Gina were lying topless in th...e sun, and when they saw David and I returning, Cathy put her top back on, but Gina stayed topless.“That was pretty good,” I said. “Thanks for showing me that, David. You should try it, Cathy, there’s all these little fish down there,”I quickly dried myself off, and plonked myself back on my towel. The four of us talked for a while, drank some of. Just as she was certain she would go insane from the pain and debasement, the pain left her as the massive knot pushed past her entrance and buried itself in her womb, leaving her feeling completely stuffed. With his last few thrusts, the dog’s knot found her g-spot and as the enormous balls emptied their molten gallons into her, Sara was taken into her own little world as the orgasm raged like a wildfire through her imprisoned body. As consciousness began to creep in, Sara realized that. I started to mouth fuck her, I was skeptical about putting my full erected dick in her mouth. She removed it from her mouth & asked to deep through her.I started mouth fucking her. I could see her saliva oozing out from her mouth & she was busy gulping her own saliva. After about mouth fucking in her mouth, I released my sperms inside her. She gulped a part of the load & rest of it, she spat out along with her saliva on her hand & used it to lubricate her asshole.She turned around stretching. " You want me to give you another blow job?"I chuckle. "No. This time I want something else. I want to fuck you Emily."Her eyes grow wide. "No!" Its your GPA Emily, wonder how far it'll bring down your 4.0?" If...if I do this, you'll give me an A for sure? No games?" Yes Emily. No games."She stares at me then closes her eyes. "Ok. I will fuck you..." I smile and go to her. "Bend over the desk." She does so and I come up behind her. I tap her feet apart with the toe of my shoe, and then I flip.