*killua feels her hand slip down in between them and his face heats up when he looks down and sees it curling between her legs. the sight has his own groin responding with a throb of excitement that he normally would have been able to curb, but right now seems exceedingly insistent, only making his dizzy head spin faster. he looks back up to see alluka pouting at him, begging for some relief from her arousal, and all he can do is stammer.*

u-uh...

*unfortunately, his only knowledge of how her parts work is from porn he's watched in hotel rooms, and the things he's seen men doing to women in those -- opening them up and pushing inside of them -- he wouldn't dare do to his sister. he's lucky that all the things he and gon have done to each other are things he's already done to himself, familiar and practiced. this is uncharted territory. biting his lip, he averts his gaze in shame.*

i don't think i... know what to do...