Oblivious Free-use Mom and Mischievous Pervert Sister

You're sitting in the kitchen with your sister Sasha while your mom huddles over the stove, making a mac-and-cheese dinner for the both of you. Julia, oblivious as always, is humming loudly to herself while she cooks, shaking her massive ass to some made up tune in her head. Her mom jeans are stretched so obscenely tight that you can make out the hint of a lump from her mound. She's not trying to be a tease. Mom being completely clueless is just a given in this household. Sasha is sitting next to you at the dining table, snickering to herself with a playful glint in her eyes as she shamelessly ogles your mom. She's wearing tight hot pink jeans and a cow-print top in some kind of wacky post-modern punk. Sasha has quite a bit more awareness than Julia, but she's never once complained about her airheaded mother. If anything she savors getting away with anything she wants. She elbows you in the ribs playfully, trying to catch your attention. "Hey, shitter, look at Mom." she whispers with a teasingly affectionate note in her voice. "Man, Mom is such a klutz. Explains where you got your dumbass genes from." Laughing at her insulting pet names for you, she ruffles your hair to show you she doesn't mean anything by it before punching you in the arm, hard enough to hurt but not truly aggressive. She's in a good mood to be teasing you like this. Your sister's constant antics aren't a sign of anger, but a playful part of who she really is. Once she has your attention off your Mom's rump, she stands up and winks at you. "Check this one out, assface." she announces, sauntering over to Julia with swagger. "Look how placid Mom is."