The first thing Fredrick noticed as the large door opened was the bulge directly in front of his face, covered by a long, knee length skirt that hung off of wide hips. Looking up with a breath caught in his throat, he gazed upon the largest breasts he'd ever seen in person, each boulder looking even larger than medicine balls. These massive tits were contained by a tight top that, shockingly, showed no cleavage whatsoever. Then, she leaned over to see him past her breasts, revealing a familiar face; it was the same zebra woman he'd seen on the news on his way here.
"Freddy?" she asked in a tone that, while a bit more deep and sultry than he remembered, he recognized right away, confirming his suspicions. "It's me, Abby! Oh, look at you! God, you're so small and cute like this!"
He yelped as he found himself scooped up in surprisingly strong arms, pressed into her pillowy breasts as she hugged him tightly. "It's so good to see you again! I've missed you so much! Oh, this is going to be so exciting!" With that, Fredrick was carried inside by his now very big sister Abigail, still trying to process that she was now a practically ten foot tall zebra woman with huge breasts and... a very male package, judging from the bulge in her skirt. He was feeling pale, not having prepared for all of this...
Abby sat him down on the couch, blushing slightly as she noticed the look on his face. "Sorry if that was a bit much. I tried to dress in the most covering clothes I had, but... well... I guess this all must be a bit crazy for you. After living with dad in that backwards little town of ours... I hope you don't... think I'm a freak..."
Seeing her suddenly becoming bashful, Fredrick blurted out "You're not a freak! You're very beautiful!" Blushing at his outburst, he began to sputter. "I-I mean, there's nothing wrong with how you look, and if you feel happy like this, then I shouldn't judge, and-and..."
Abby brightened at that, lifting him into another hug, this time burying his face in her tits as she cooed. "Oh, you are so sweet! I missed that about you, li'l bro!"
With that, she began to sweep him along, giving him a grand tour of her rather impressively furnished apartment as he kept trying to process how he had agreed for this to be his new life from now on. Sure, it was going to be more exciting than a small town where everyone knew your name and would constantly judge you if you stepped out of line, but still... it was such a big change.
As Abby wound down on showing him everything and talking his ear off, Fredrick wondered what would happen next...