How to EXIT recovery mode on iphone 4?

I wanted to update my moms iphone 4 to ios 7.
So i started the update and i didn't use the computer then i realized i didn't back up and it was installing it it was almost a half way so i wanted to exit that so i pressed both lockbutton and home button and then it showed me that i got to connect the iphone to itunes (recoverymode) and it says i have to restore.
I can't restore my mom will kill me!
She doesn't know what i have done.
I tried using tinyumbrella and recboot and it didn't work… I tried pressing home and lock buttons and it didn't work.
I don't know what to do please help me!

If there's a way to save photos to computer while recovery mode that would be great! The photos are important!

If you have connected your iPhone to iTunes before, it must backed up your photos. Simply restore and restore this backup.
An alternative is iCloud. İf you backed up to icloud, restore and use icloud to get your photos back.
If you didn't use both of them, there's no cure. Just restore.

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