After I had paid and pushed my trolley out into the car park, the guy was waiting for me. He wanted to thank me for my help. Then he asked if he could...help me with my shopping, lifted four carrier bags out of my trolley, and walked with me to my car, where I put everything in the boot.The guy's stuff was all still in his trolley. I thanked him for his help and asked what he was going to do with his shopping, and he told me he was going to get a taxi.He asked if he could buy me a coffee in. I was just casually asking and not trying to be jealous. I actually got turned on watching Matt fuck. I just wanted to make sure she wasn't getting feelings for him. So I guess it was borderline jealousy.She came right out and said she loves her husband and it's just pure sex on the side with Matt. I had that feeling by the way she treated him like a piece of meat whenever I caught them fucking from my usual perch at the top of the staircase. She would smack his ass and yell at him to fuck her. "Aaahh Zach yes!" Presley moaned loudly with pleasure as her brother thrust his erect penis into her. At that moment Zach realized that his younger sister was not feeling the same way. She wanted this, she was enjoying it, maybe even she has been dreaming of it. Zach looked down at Presley's lustful gaze and pushed every uncomfortable thought out of his head. He focused on her sexy teenage body, pushing the thought that this was his sister as far as he could while he focused on his new. As the last drips fell from the tip of his dick, Emily sighed. Using her fingers, she scooped up some of his cum from her body and put them in her mouth, sucking them clean. Then she pulled Andrew down onto her and kissed him, letting his own cum slide from her tongue into his mouth. Tasting his own salty ejaculate was a new sensation for Andrew, and it turned him on more than he wanted to admit. He licked at her nipple, cleaning off more of his cum, showed her the thick goo in his mouth, then.