"Yes..." She moaned, rubbing herself faster and harder, completely oblivious to the fact you had done this to her moments ago. "Please take me big brother." she whimpered as she opened her legs wide enough for you to see how wet she truly was.
You couldn't help but feel your dick harden at that sight, and decided it was time to give in to your own desires as well... And if the veil could make her forget about this later on? So much better!
Your sister looked up at you with pleading eyes as she sat down on her bed. "Please brother..." She begged, spreading herself even wider for you. You couldn't help but oblige her request and soon enough found yourself inside of her tightness, filling her completely...
She moaned loudly under your weight, arching her back as you pumped into her with abandon, enjoying the feeling of her soft body against yours, her warmth enveloping you. "Oh god!" she cried out, biting her lip to keep from moaning too loudly.
"That's a good little slut." You whispered in her ear as you felt yourself getting closer to your climax..." I can already feel how much you like it..."
She whimpered softly but couldn't deny the truth of what you had said: She was enjoying herself immensely, and though she felt perverted and ashamed, those feelings only made her feel even more aroused.
"Oh god! I... I love it so much..." She moaned as your cock slid in and out of her tight pussy, filling her completely. "I never knew how good this could feel!" she said between moans, clearly enjoying herself despite the situation they were in.
You couldn't help but grin to yourself. Your little sister was a real nympho just waiting for you to discover it... And now that you had, there would be no going back!
You continued pumping into her until you felt your orgasm coming on and decided it was time. "Emily," you said with a sly grin on your face, gripping the veil just before you reached your climax inside of her, "When I'm done... you won't remember any of this ever happening, and you won't perceive my presence until I speak with you again."
And with that last statement, you came hard into your sister, coating her insides white as she moaned loudly underneath you. The pleasure was so intense you couldn't help but grin dumbly at the situation.
When you finished, you pulled out and looked down at her naked body, still breathing heavily from the exertion. The look of confusion in her eyes as she came down from the high of her orgasm was priceless. She looked at herself lying naked with a blank expression on her face and no memory of how it had happened. "What... did I do?" She asked, looking down between her legs to find your cum slowly trickling out of her well-used pussy.
You couldn't help but chuckle as you pulled up your pants, observing your sister to see how she reacted. She muttered to herself, "this isn't the craziest scenario in my life, but usually, I at least remember how it happened..."
She looked around her room, realizing that she was naked and filled with cum. "Was there... a guy? Or did I have another wet dream?" She asked herself out loud, clearly not believing the second option.
After a moment of consideration, she decided to take a shower before her parents came home. You couldn't help but smile at how things had turned out so far.
You watched your sister cleaning herself in the shower, but you were caught off guard to hear her moan as she did so. She was still aroused by everything, after all. Perhaps the sensations of a new body soap were enough for her now? You couldn't help but think that this would make things very interesting indeed.