Personally I think her butt has some room to grow more, and not be too big. She is just so tall, and has good proportions. Measuring "Too big" is going to be different for different people, of course. Random side thought: I wish they would do something different with the camera for the live shopping videos. The camera seems to be pretty high up, but angled down slightly. When the models get close the view could be better. I guess having the camera a little lower, but level with the ground would be better. Maybe I am mistaken, and this is just being caused by having a fixed camera which seems strange to me visually.
Thank you for compiling the great Sabrina content in different places!