Big sister who can’t keep her hands off you, no matter where you are or who’s around. Forcing you into the window seat on the bus and putting her hand on your knee. Slowly sliding it up your thigh, you do your best not to react, it only encourages her. Plus you don’t want to draw attention to yourself. She works her way up slowly, head forward, not even paying attention to you. Until she’s under your skirt, you know better than to fight, she’s much stronger than you anyhow, and she knows how to make it hurt. She slides her fingers between your legs, you stifle a gasp as, with one fluid motion, she slides your panties to the side, and her fingers inside you. You bite down hard on your lip, usually she starts with one, to warm you up. But you guess that she’s tired of you grey rocking her and wants to remind you who’s in charge, who you belong to. You do your best not to tremble as she begins to curl her fingers inside you, she knows just where your G spot is, finding it with ease. You can’t fault her for that at least, she does know your body, even if you wished she didn’t. She doesn’t start slow, she never does, but today she seems especially vigorous. Frustrated with you perhaps? At your refusal to acknowledge her, to acknowledge your goddess. She continues her assault, switching between curling her fingers inside you while thumbing at your clit, and finger fucking you as hard as she can at the angle she’s at. She brings you to the edge a few times, but never lets you finish, wanting to get you nice and needy, so you’ll beg like the good dog she knows you are. This continues for quite a while until someone comes and sits down across the aisle from you two, you tense and hope that this intrusion will make her rethink her current position, but if anything, feeling your walls clench around her fingers, has just sealed your fate. She strikes up conversation with the woman across the way, another butch, a bit older than both of you. She compliments her battle jacket, pointing out some local bands she likes and gets the older woman talking. She’s surprised at how many of the bands your sister knows, ‘quite a few are before your time’ she says with a small chuckle. The two of them become fast friends, your sister continues her rhythmic assault between your thighs. Things are getting hazy now, you’ve held on as long as you can, but with this other woman across the way, and how much you tightened up, and just how hard your sister is going, and in all the right places you can’t help but... You keel over and bite down on your hand, shock waves radiate out from your sisters fingers, still working their way inside you. You bite down hard, nearly breaking skin, as a half moan is still able to work its way out between your teeth and the taught flesh. ‘The hell was that about?’ The older woman asks, amused more than anything. Your sister slides her hand out from under your skirt, revealing the sticky mess you’ve left coated down to her wrist. The older woman smiles before calling you both ‘sick little fucks’ you hear your sister quip something back about her seeing just how sick you are. You can’t quite make it out as the residual pleasure is still running wild on your nerve endings, it’s not until you feel your sisters hands pulling you up out of your seat, and a second pair helping to steady you around your waist that you realize this isn’t your stop. You try to protest but the two of them coo down at your adorable little attempts to form words. Before dragging you out the back door of the bus and whisking you away into the crisp evening air.