I secretly watch my small stepsister receive oral sex and accidentally ejaculate in her mouth

I've been keeping a close eye on my stepsister, secretly enjoying watching her get pleasured. Today, I accidentally climaxed while observing, and she eagerly swallowed it all. This taboo experience was beyond intense.

I've always been fascinated by my stepsister's luscious curves and perky tits. I've been sneaking around, watching her get pleasured by her lover. It's a sight to behold, the way he explores every inch of her body with his tongue, making her moan in ecstasy. I can't help but get aroused, my own cock throbbing in my pants. Today, I decided to sneak a peek again, and what I saw left me breathless. He had her on her knees, her face covered in his cum after he made her squirt. The sight of her, covered in his essence, was too much for me. I climaxed right there, imagining it was me giving her that pleasure. It's a fantasy that's becoming harder and harder to resist.