Board Thread:Wiki-Related Discussion/@comment-4975807-20180520221943/@comment-35486125-20180520225242

Since there seems to be an aging issue with both Alice and Robin it's too bad they didn't say that a consequence of their accelerated births caused them to age faster up to a point, could also include Gideon. I kind of like the idea that there was an unseen story/adventure with a new villain in Storybrooke who somehow caused Robin to age faster. Maybe Glinda the Good went bad and as revenge on Zelena she tried to age Robin to dust and 18 is the age they were able to stop the spell at. Or maybe young Robin and Neil snuck into Mr. Gold's shop and playing around in Mr. Gold's shop and Robin got into magic that she wasn't supposed to xD

I know... all speculation... but I look forward to seeing what people come up with for their head canon!