Iola acted like an overgrown schoolgirl and liked it!
Iola never struck me as a woman. She didn't seem to have any interest in having a kids or romance..(only a crush on Vint) puppy love.. She only hung around Thelma, giving her advice, trading thoughts and ideas, but mature conversations? I don't recall any. I think Iola loved being a spinster school girl. She surely wasn't aware how people dressed or behaved in public places.
I think she didn't grow up because her mommy and daddy told her not too. She certainly attributed a naivity that was difficult to correct had she lived in the real world... Lastly, that KNOCK KNOCK, when she let herself in Thelmas house made me sick just to see her coming in.