I'm curious about her, they show her and it doesn't seem like she aged...at all. Also, they seem afraid of Molly, why could this be? There is also when she walks in on Matt and Daphne just getting done with their fight and she seemed to know. Could it be that her power has depths we don't quite know about yet? I dunno, maybe it's gotten the point she is aware of things around her in a certain area? Just interesting thoughts that flitted through my skull.

Umm... how do you make a 12 year old girl age 4 years in a couple weeks?
You don't. You just have to deal with the problem of having a 12 year old pretending to be 14 or 15.

^What he said. Not all girls appear to be their age, even in real life. Also, didn't it occur to you that Molly knew they were arguing because they might argue regularly? And remember that Molly can see people's surroundings, so she could have seen them fighting.

They weren't afraid of Molly, they didn't want her to feel responsible if something bad happened when they used her to find Peter. Look how that ended up. Molly telling them where he was caused Costa Verde to blow up and for Daphne to die.

Ya, I can understand why she didn't look older now, and I can even understand why they were reluctant now as well. Just it seemed like they were afraid, cause Knox mentioned something about if she was afraid then he would do it.

I like how they used the actess in this episode. By lowering her voice and actually showing how tall she is she looked belivable as a 14 year old. I have never been much of a fan of her Shirley Temple acting so I was surprised by how good she ended up being in this episode.

I think they did a good job making Adair look older; and it was probably the right call in this case since it was only for one episode. But in general, such aging is normally accomplished by getting a new actor/actress.

But only a year has past since Sylar killed her parents, I don't think Molly IS 12, the reason why the actress, who is now older, and play her older self.

I think her acting was good and she acted even more mature than before.
Looks doesn't always say the age. There are many "babyfaces" running around in our world after all.