Instead of yelling at her, just gently remove the toy from her mouth and put it away. You can then take your time to get a new toy ready for playtime with a kitten.
What if a cat wants to be alone? Sometimes cats want to chill out. If you hear this kind of noise coming from your cat while he is playing or sleeping, don’t rush in there immediately. Instead, give him some space and wait until he’s done playing or sleeping before going into his room. Then let him know that it’s okay to be there again by petting him when you’re near him or resetting the clock on his favorite toys so that they are ready for another round of playtime after you’ve been gone for awhile!