Two Cozy Glow's from different timelines meet, on the left, adult Cozy Glow from my timeline (Who is very much canon Cozy Glow and evil) and on the right, good Cozy Glow (who never became evil but gets pulled out of the School Of Friendship because of medical reasons) who resides at Dazz's nursery and has a medical condition, that condition makes her required to be diapered and gets babied as a result. The condition caused from getting severely hurt by her parents, causing nerve damage, otherwise being incontinent.

Main timeline/canon Cozy Glow shocked as she sees her alternate timeline self, being in more disbelief that she's wearing a romper and a diaper underneath. She would be speechless and be in complete disbelief because she was never like that as a filly, in fact, she was too busy scheming to do anything like that. The alternate Cozy Glow having innocence in her eyes and assuming that it's the grown up version of herself when it's not true for a fact, she would probably be terrified if she found out that this version is evil and got turned to stone, which would probably cause her to connect to why Sirius overreacted when he saw her.

For those of you who probably don't know, the alternate timeline Cozy Glow is the one from Dazz's Discord Server and there's this Roleplay series that us server members do, I play as Shatter but now playing as Sirius Canis Major, playing both characters.