Ordinary sex turned into hot, dirty anal

She lay on her back, her body shaking with every slow thrust. Normal, gentle sex - his cock slid into her wet pussy, and she moaned, her legs around his thighs. But with each movement, the desire grew. He walked out, swiped his finger lower, and she didn't mind. "I want you all," he whispered. She nodded, biting her lip. A little lubricant, and now his hard slowly penetrates her tight hole. Gently at first, then deeper, until she began to moan louder, fully surrendering to a new, thrilling pleasure.