It was very hard trying to take him seriously, but Penny was mature (or she was trying to be anyway). Hearing his little voice talking about work and rent, well, it was pretty much the cutest thing she'd ever heard. She knew where he was coming from though, and having just gone through a rather crazy breakthrough with being in the dark about Johnny's power, she could understand the fear of the unknown that was currently upon him.
She sighed and pushed aside whatever wild emotions she had about him at the moment, whether it was 'awwwing' at how adorable he was or wanting to bash in his skull for being a douche lately. She just couldn't focus on that now. Despite it all, he was still her friend, and they both knew that she was the only one who could help him right now. Taking a seat across from him (and yes, her feet did actually touch the ground), Penny looked him over, trying assess whatever she could about Laney's power.
"Seems like you should just be able to change back by thinking about getting older again. It's your basic age alteration ability. You can get older or younger at will. You just have to control it. What were you thinking about when you changed? And.... Laney Evans? Really?" I'm much older than she is, by the way, she wanted to add.