While he would love to be here continuing to progress and use her, he still didn't like her due to her strong language. And so he decided to get a bit more freedom from her. "Remember, You're a rental toilet, so you have to go back to the school. They've been wanting you back, anyways."
She looked up at him. "Yeah, I guess I forgot about that. Thank you for reminding me." She jumped up and hugged him, something Jeff was definitely not expecting. This gaslighting had certainly changed her personality. He realized he could feel something wet against him, though, and looked down to check.
His pants had apparently fallen down completely without him noticing, and his dick was still exposed. The way her skirt pressed against his chest though indicated what he was feeling, as she wrapped her legs around him. The wet feeling, from what he could tell, was her vulva. He decided to bring it up.
"What, did you enjoy my presence that much?" She looked up at him confused, as he reached down and put his hand under her butt, poking her vulva. She blushed as she realized what he was referring to, as his finger was now wet. "U-Uhhh..." Jeff saw this as a fun opportunity. "So you forgot a lot of what you do, and then after wanting to tell your friends I jack off with a toilet, you're aroused because of me?"
Embarrassed, she groaned as she pressed her face against his chest. He rubbed her pussy, realizing just how close she was to his cock. Seeing his sister like this, he almost didn't want her to stay at the school, if it wasn't for her sharp language towards him. He decided to do something. "Say, Sis... Since you're heading back to the school..."
She looked up at him, as he put his finger through her lower lips. "Well, you seem to be pretty wet down there, and it seems as though it was my doing... So, what do you say?" She stared into his eyes, before understanding what he meant. "I-I uhh-" She felt extremely uncomfortable and embarrassed at the situation.
He leaned down and kissed her on the forehead, being able to finally enjoy her company. "Heh, maybe I'll ask to keep you here a bit longer..." He sat down on her own toilet, thinking of the irony about a toilet having a toilet. Reading her expression, she seemed heavily unsure about the situation. She eventually stuttered out an answer. "Y-Yeah... That, that'd be nice..."
She rubs herself against his cock for a moment as he moves his hand, using it to insert the dick. He held her close, and began to start the fun. "I won't go too hard on you, little sis." He bounced her up and down, keeping it slow...
After about seven minutes, Jeff unleashed his seed inside his sister, before slowing down further. He went a bit harder than intended in the middle, and quickly slowed down after hearing her in pain. With him having already climaxed, he could tell she was coming close. Holding her close, he reached under and got his finger in, trying to help her reach it.
She reached her climax, and the two sat there for a while, not breaking the moment. Eventually Jeff decided to speak. "You okay?" She looked up, blushing hard, as an "Mm-hmm..." was her only response. He stood up, still holding her close. He walked out of her bathroom, their mixed cum dripping from her.
He took a look at the time, not realizing just how much time the two spent in there. He knew that Alice's practice went late, but they somehow spent three hours in there. "It's getting late... We should get to bed soon."
He pulled her shirt over her head, exposing her chest. He then tried to pull her skirt off, managing to have it fall down without exiting her. Jeff walked to his sister's drawers, but then stopped, deciding he wanted to ask her directly. "Actually, Al? You going to sleep naked? And also... Would you like to sleep with me?"