I secretly watch my small sister as she gives a wealthy man a blowjob, and I unintentionally ejaculate in her mouth

I've always been a bit of a voyeur, and my secret pleasure is watching my sister as she indulges in her desires. Today, she's with a wealthy man, and I can't resist the temptation to watch her in action. As I observe from my hiding spot, I see her expertly take him into her mouth, her tongue dancing around his shaft. The sight is intoxicating, and before I know it, I'm lost in the moment, my body reacting instinctively. I can't hold back, and I release my pent-up desire right into her eager mouth, surprising both of us. My sister, taken aback by my sudden climax, quickly composes herself and returns to pleasuring her new companion. The sight is a mix of shock, surprise, and a hint of pleasure for her. As I quietly slip away, I can't help but wonder if this will be our little secret.