Andrew didn't have time to contemplate that his twin sister had looked straight at him but continued her show, his eyes staring at her tits and ass, before he was apparently spotted by one of the girls. He froze, mid stroke, as all eyes turned towards the dark hallway where he was hidden, panic quickly rising into his throat.<br/><br/>He didn't bother trying to tuck his cock away. Instead, he spun on his heels even as one of them called out to him, quickly sprinting down the hallway on the balls of his feet before taking the stairs two at a time until he reached the top. He didn't stop there, though his thighs burned slightly from the sudden explosive exercise of jumping up stairs as fast as he could.<br/><br/>He did pause long enough to slide his still erect cock back into his pants - he didn't want it to get caught on his zipper accidentally - before bolting into his room, shutting the door behind him before flopping onto his bed, on his back. He panted then, catching his breath, both embarrassed and aroused from the sudden turn of events.