Just as the thought ran through Linda's head, he looked to see Sarah's ears drawing into points while yellow fur matching his hair color began covering the outside and white fur sprouting on the inside. The pair made their way up his head until they stood on top of his head, much like Linda's.
The former girl went through the same changes as Linda, with Sarah gaining similar whiskers on his feline lips, his wide eyes gaining cat-like slits while still staying glittery, paw pads on his hands and presumably his feet, and to top it off, a loud noise of fabric shredding reached his red cat ears, drawing him to the yellow furred cat tail swaying expectantly behind Sarah's skirt.
Sarah tilted his head in confusion at Linda's surprised expression, causing him to turn around to try and look for what you were staring at, unaware of the sound that occurred right behind him. This gave the catboi a full view of his best friend's new tail twirling in curiosity through the hole it ripped through. It certainly didn't help that he was bending over to take a further look, allowing his bubbly butt and balls to clearly strain against his panties in front of you.
Turning back, Sarah tilted his head again with the same confusion, only with a cartoonish question mark materializing out from his head. "Did you see something, nya?" he asked with the same feline verbal tic. Linda almost didn't hear his question as he was distracted by the sudden appearance of the question mark. "Oh! Um... no, it was nothing, nya!" he said quickly as the question mark disappeared as quickly as it came.
The rest of the walk was just as depressing for Linda, with Sarah conversing with him as if being a catboi was nothing short of normal. Despite his friend's comfortableness about the situation, Linda still couldn't help but try to cover his tented skirt as much as possible. Of course, the sight of two catbois in sailor fuku was indeed normal for the new reality...