She does

"You know what? As a matter of fact I will be going with the two of you! Just to keep an eye on this dolt of a big brother of mine!" Sarah said as Vince cocked his head up at his younger sibling not sure what she was doing.
"But you don't have any of the same classes as we do, what would you be studying-" A rather hard kick to the back of his legs made him stop as Sarah gave him a look that said quiet as he groaned.
"What was that for?!"
"For not thinking what if my precious younger sister needs help with her own work not yours! You can spend some time with me can't you?"
"Sure thing kid! We'd love to have you!" Hino said as Sarah deflated at the kid part, she was already the younger futa between them and that meant that she was most likely not going to be the one going balls deep this night if anyone did at all.
"T-thanks Hino."
"No problem! You ready Vince?"
"Yeah why not, tell mom you are over here or she'll worry."
"I'm not a kid anymore! I don't have to tell mom everything I do!"
"Ok but if you get in trouble that is on you not me." She fumed glaring daggers at him as the three began to make their way towards Hino's house and away from the school. The walk was short but rather awkward, Sarah seemed hell bent to get the last word in on anything Hino said, and Hino not threatened by the younger futa simply took it in stride. Laughing at it like it was all a good joke making Sarah fume at the lack of respect. Leading her to try to drag Vince into the arguments as she pulled his arm against her breasts, her soft mounds smaller than some futas but were still rather large and soft. Making him flush as he **** himself to remind himself that she was in fact his little sister even if only half. Eventually they reached her home a solid two-story house she shared with her parents and four dogs. The door swung open to a rather cleaned and swept living room, a couch that could fit five and two love seats, a rather lazy pug looked up and lazily wagged his tail and barked weakly at them.
"Hey there boy! How are you doing Quasi?" She asked walking forward and petting her dog Vince's eyes glued to her ass barely held together in her tight jeans, allowing a great view of the ass that had once smothered him along with her fat and heavy balls-
"Take a picture bro it'll last longer." Sarah rolled her eyes hissing as she stalked forward shaking her wide but not as wide as Hino's hips, she was far slimmer due to her natural size, but she cut a curvy figure as her ass bounced in her skirt. He blushed as the door closed behind him the pug lazily got up and barked in a almost whimper, licking Hino's hand walking to Sarah and licking her shin making her squee before it bounded to him as he rubbed his face as the dog nuzzled his favorite strange.
"Ok! Time to start studying we'll get pizza later but for now let's try to learn something!" Hino said as they settled in, unfortunately for Vince the studying was unorganized and chaotic both of them demanding his attention Hino trying to figure out history and Sarah trying to learn the basics of academy level math he was pulled both ways and in the end the couch was full up of notes, papers and books leaving no room for him to sit! Quasi nuzzled his leg as Vince sighed the pizza was coming three extra-large extra cheese pies coming fast but he had to rest! He had been walking back and forth, and he needed to sit the only problems was the lack of a seat, the lack of chairs had a futa in each and the couch was out of the question as both might explode if he so much as breathed on their notes. He sighed rubbing the pugs head as Hino noticed his discomfort first.
"Something wrong Clit dick?"
"Tired from helping both of you, I need to sit but both of you have claimed the only seats-"
"You should have been quicker on the up-take bro." Sarah said smugly making him roll his eyes as Hino hummed.
"Ah! Simple! Come sit on my lap! You can fit and we can work better together!" Sarah's smug look evaporates in less than half a second going from the smug younger sibling to the horrified pilot of a crashing plane as she coughed loudly.
"W-what!? You want him in your lap!?"
"Sure? Why not? Not like he's ever gonna get another futa to offer it to him. Besides it's what friends do especially best friends so come on over Clit dick and pop that fat ass on me! I promise I won't get that hard." She said laughing as he swore, he caught a bit of a blush on her face, was she finally making a move on him? She had always been tense around him as of late but maybe the throat fuck, she gave him had finally pushed her over the edge-
"N-no way! You should sit on my lap! I... I'm your sister and siblings should stick together!" Sarah blurted as for the first time Hino gave her a look that was decidedly not friendly as she saw her as more than just a fun bit of entertainment and now an obstacle to her plans.
"T-that's ok kid he should be helping me with our work you know? You can study with your big bro later!"
"I need help to! Come on bro don't leave me!"
"Vince, you know you gotta help me, I'll crash without you!" Hino said both futas begging for his ass on their lap no double ending up grinding on their massive cock as they clearly would not fantasize about breeding him and knocking him up as he wondered if it was even worth it to sit on either lap as he decided?