What happened to Karla?

After watching the episode where the baby bears are stranded on an island, I was left wondering what happened to Karla. Did she go back to her sister Dave? I think it's pretty obvious he died on the island since no one went looking for him. But what about Karla? Honestly, I would have loved an episode where the bears reunite with her to find out what became of her, but I guess we'll never know.