Simon quickly tugged his boxers back up. Lauren pulled her panties all the way off and handed them to him, letting her dress fall back down to cover herself. Simon stuffed them in his pocket and took her hand, leading her off the path into the trees. They went barely twenty metres before Lauren stopped, "This is enough, I like the risk." Simon had a moment of doubt,
"What about condoms?"
"I'm on birth control, you can cum inside me." Simon's cock twitched and he knew he wasn't going to say no to that.
Simon looked back towards the path. It was almost all obscured, but they'd be able to see people walking past, and if someone looked too closely in their direction they could be spotted. He looked back at Lauren and immediately stopped worrying about condoms or being caught. She was bending over against her tree with her dress hiked all the way up. Her ass was spread and her pussy visibly wet. She was looking over her shoulder at him with an incredibly sexy smirk. He could tell she loved being outdoors like this.
He stepped up behind her and gripped her hips, stroking his cock against her pussy. She moaned at the touch and bounced her ass, begging to be fucked. "You like being a slut in public like this?" he whispered to her, and she could only moan in response. He had been thinking of this moment over and over, even when fucking Jess he could only picture Lauren's body. He slowly pressed his cock to the entrance of her pussy and it opened to welcome his cock. He slowly felt each inch, pushing his cock all the way into her.
Lauren groaned as he bottomed out inside her, and Simon held still all the way inside her. He grabbed her by her hair and pressed his mouth to her ear, whispering again in case anyone nearby could hear, "You're a dirty slut, aren't you?" Lauren froze when he started speaking, and he slowly started fucking her, "Fucking me in a park behind your husband's back, getting used in public like this? Your pussy is so desperate and wet when you're being a horrible whore." He intentionally used the words she had used just minutes before.
Lauren didn't reply, but she gasped at each thrust of his cock. Simon also started to lose his ability to speak as her pussy stroked his cock. She was tight and wet, and the feeling of finally fucking her was so intense. She braced herself against the tree as he fucked her faster. Simon focused entirely on the sight of her ass bouncing against him and his cock disappearing inside her over and over. He didn't even think to look around for people using the park.
Fortunately he didn't need to look, because the group walking along the path were chatting and laughing loudly. Simon and Lauren both heard them and froze, staring through the trees as they rounded the corner. It was two men and two women walking two dogs. They weren't looking into the trees so Simon started slowly fucking Lauren again. She didn't even try to stop him fucking her while the group got closer and closer. She moaned softly and Simon covered her mouth while fucking her even harder.