Amberzinha's heart races as her brother's hand brushes against hers, igniting a spark that sends electric shocks down her spine. They're alone, the house silent except for their labored breaths. His fingers trace the hem of her shirt, asking for permission, and she nods, biting her lip. He lifts it off, revealing her lacy bra, and she can see the hunger in his eyes, matching her own. They're playing with fire, but they can't stop now.