Because Anna doesn't trust Myra, she doesn't want her to touch anything of hers. You can let her serve you is already your last patience. So no matter what she said, she was determined not to let Myra open her suitcase.
"She went to the kitchen to prepare breakfast and brought it up to my room and left the suitcase there, I made it myself." Anna intentionally found another job for Myra to do.
"I'll put my clothes in the closet and I'll go to the kitchen to bring you breakfast." Myra was still stubborn.
Myra squinted at the suitcase, the more Anna prevented her from opening it, the more she wanted to open it. She guessed that there were a lot of precious things in here, so she was afraid she would see it and steal it.
"I'm not messing around with you anymore, I'll tell you straightI don't want anyone to touch my suitcase." Anna was extremely annoyed with Myra's disobedience.