User blog:BlueJhet/Princess Bubblegum Age Question

I hate to nitpick, but I just need to ask... I looked at Princess Bubblegum's age and Finn's age. It appears that Finn's age in the debut of the series, he was thirteen. Now he's fifteen, apparently. Here's the question. Princess Bubblegum was 18 when the series started. And she's STILL 18. I'm just wondering if Pendleton Ward has not really confirmed or updated the age yet or if he's purposely trying to keep PB 18. Is she not aging? Or has Pendleton Ward not confirmed it. I'm leaning more that Pendleton Ward hasn't said it yet, but again, I'm just nitpicking. Any thoughts???