The nephew's handprint on his aunt's ass burns like a brand, a symbol of their shared secret. She looks back at him, her eyes filled with lust and a hint of shame, as she whispers, "Fuck me, nephew. Make it hurt." He obliges, his cock throbbing as he enters her from behind, her tight pussy enveloping him. She gasps, her nails digging into the wall as he pounds into her, their bodies slapping together in a rhythm that echoes their familial taboo. She comes with a scream, her body convulsing as he fills her with his hot cum.