Understandable considering what she's been through she wont be able to handle another one of those experience..
Considering How Kaguya supposedly looks like Chang'e (being the the japanese interpretation)....
Huh...? ... Will end up like this! H-... My... Hic... My Udon-chan... J-Junko! This is... aaaah! My Udon-chan... Th-This is bad! This pattern... Chang'e, are you watching!?