Petite and nerdy step sisters learn to pleasure me orally

I've always found the taboo of sharing with my step-sister intriguing. She's a nerdy little minx, always wearing her glasses and studying. But when it comes to pleasing me orally, she's a natural. Watching her and her friend, both petite and innocent-looking, take turns on my cock is a sight to behold. They're eager to learn, their eyes wide with curiosity and excitement. They're not afraid to share, taking turns sucking my dick while I watch, their young lips working in tandem. The sight of them together, their bodies intertwined around mine, is a dream come true. I can't help but lose control, fucking one of them as the other watches, their faces flushed with arousal. It's a wild ride, a combination of innocence and lust that leaves me breathless.