As children, it was only natural to look at each other's genitals—my brother's penis and my sister's breasts. As adults, of course, there's no way we would ever stare at each other's bodies like that… 'Because you'll get paid,' my virgin brother pleaded, and I reluctantly agreed to practice sex. Even if she is my sister, seeing real huge tits up close made my brother's penis rock hard! Just rubbing against her wasn't enough to calm it down, so he thrust into her vagina on impulse! My sister was flustered by the unexpected turn of events but couldn't resist the pleasure…
