As the door to the bathroom creaked open, Alex was caught off guard by the sight of his stepsister's panties around her ankles and her plump ass pointing at him. He'd never seen her like this before. "What are you doing?" he asked, his voice cracking slightly.
"I thought you might like this," she replied with a wicked grin, not bothering to cover herself up any further. Before he could process what was happening, she lowered herself onto the toilet seat, exposing her tight, pink asshole. "Come on, don't tell me you've never wanted to see this."
Alex's heart was racing now. He knew he shouldn't be doing this, but the forbidden nature of it all only fueled his arousal. He slowly approached her, unable to tear his eyes away from her tempting ass. As he stepped closer, he could feel his heart race in anticipation, wondering if she would notice him admiring her.
