He pulled it off

Vince was either very lucky or someone was looking out for him because he got through the rest of the day without being molested by any other futa be they teacher, staff or student. At the end of the day he was finally free of the school day's grip, and he made his way out through the throng of students as he looked around. He quickly saw Sarah waiting for him his younger half-sister looking left and right as she finally saw him and waved. He waved back looking around noticing the tall Asian futa from class blowing him a kiss from across the way. He flushed and quickly ran down to his sister. She was just barely taller than him with short crimson hair, pale skin bright blue eyes and only slightly large breasts. She wore a short skirt with her cock strapped down to one of her legs with a single cock warmer fully covering it. As she often got her cock cold when she just let it hang out.
"Hey bro! You ready to go home?" The bubbly eighteen-year-old asked as she looked up barely at her older half-brother, her height superiority came from her large shoes, she was rather short for a futa, but that didn't mean she was any less of one in her need to breed a tight boi pussy and make it carry her kids.
"Sure, I think that I've had a long day and need to talk to mom."
"Oh? I heard that you got something weird done to you, you ok?" She asked cocking her head as the two of them began to walk forward as he sighed wondering just what to tell Sarah as he did not want to let her know that he had been put into a tight chastity cage that he had no easy way out of, at least not without outside help.
"I don't want to talk about it... not now."
"Well, if you every feel like talking just lemme know." Sarah said yawning as she not so secretly looked at Vince's large ass. Half-sister or not it was clear to him that she stole glances at his curvy body, thick juicy booty and deliciously thick thighs. He always shook it off but the more she looked the more **** he felt as his dick surged in its tight metallic cage as they began to journey home.
"So, if you don't want to talk about it want me to tell you about my day?"
"Sure, why not?"
"Well, it was pretty fun! I did get a B on math which is better than my last D so mom should be happy with me. I also was able to ace my time with the swim team so I'm looking at a pretty good shot at going to regionals at this rate."
"That's great, you always were a great swimmer."
"It's how I got this banging body!" She said sticking out her chest and letting her hips sway making her short skirt flap up a bit showing off her thick pale ass making Vince cock as his dick once more tried and failed to break fee as Sarah hummed.
"Also, I heard that you almost got fucked in class today, what was that like?"
"I really would rather not talk about it ok?"
"I mean come on! I think that it would be kind of hot you know? If I got to fuck a boi in the class."
"You don't think of the boi in question do you?"
"Nah he'll love it trust me! That's what all my friends and swim mates say, once you get your cock in a boys ass they just turn to butter underneath you! Or that's from what I heard." She said as Vince groaned the two of them moving towards their house as he hoped his mother's would take him to the states office that night as well as hoping that his younger sister did not get any funny ideas as she kept stealing looks at his ass...