A good comment.
BUT, don't forget that although he's only 16, when the scriptwriters decree it, he can be a lot more mature in his regard to looking after the twins. As per a lot of things that happen it's down to the writers' whims for each particular situation that arises.
Personally I feel Corro has lost the plot regarding being an entertaining soap with some cracking good humour. For the past few years it has become obsessed with murders, kidnapping, fires, over-the-top accidents.
Perhaps it's a reflection on society today that people aren't interested in soaps telling the story of everyday life? Maybe the writers are afraid if there isn't something out of the ordinary happening, they might lose viewers. I think I must just be getting too old.
I remember someone saying about Midsomer Murders and the fact that if it was real life there would be no inhabitants left in any of the villages, given there's a murder every episode. It's almost getting to be the same scenario with Corro.
<end of rant>