Nứng and Cac, left alone in the house, can't ignore their growing attraction. Nứng, usually the responsible one, finds herself fantasizing about Cac's younger, innocent body. Cac, too young to understand the implications, only knows he wants his sister in a way that's wrong but feels so right. They explore each other's bodies tentatively, fingers tracing lines of desire, breaths hitching with every touch. Nứng sucks Cac's cock, her experienced mouth driving him wild, while Cac tentatively licks her pussy, tasting her for the first time. They cum together, their bodies entwined, their hearts racing, already craving more of their forbidden fruit.