*hearing her describe her pleasure makes killua's fingers itch to dig beneath the waistband of her skirt and unravel the mystery for himself, but he at least has enough restraint left to hold back from that. instead he grasps her hips, holding her in place as his own jackrabbit against her like they would a pillow, chasing after the orgasm that's just out of reach. the rest of his inhibitions simmer away as he buries his face in her shoulder, moaning freely like he never has with gon or on his own, losing himself to the sugary-sweet softness of his sister's body against his.*

good... you're so good, alluka...