She was incredibly glad to hear Timon's voice through the door. She really hoped Timon would know what to do. Kiara wasted no time nudging the door open and stepping inside.

"Timon! It's... it's Daddy. Zira found him and she tried to... and... well... Kovu stopped her, but..."

She couldn't manage to get out the most important facts of the situation, but hopefully she didn't need to. Her upset expression and Kovu standing behind her with Simba unconscious on his back was probably more than enough explanation of the general gist of the situation.