*killua's head spins with regrets as his gullible little sister follows his instructions, but the second she seats herself on his lap those thoughts get snuffed out like a light and all he can fathom is the warm weight of her pressing on his aching cock. he grips the couch beneath him as she experimentally grinds down into him, drawing in a sharp breath in response as his body tenses through a spike of pleasure, then melts into blissful relief, wrapping his arms around his sister's middle and enveloping her from behind, blushing face pressed into the junction of her shoulder and neck.*

h-hah... that's perfect, alluka...