My wife and I each have an iPad, but only one iTunes account. We wanted it like this to begin with so that we could share paid apps. This has not been a problem until now. Now I am giving up this iPad 1, moving on to an iPad 3. Do we share the same iCloud for backup? Will my data be overwritten by hers if she does a backup after me? How can two iPads share the same iTunes and iCloud? Or do we need separate accounts? Thanks.