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I'm sorry to hear about your loss.
Do you happen to know how this iPhone was normally backed up?
I am tried I cloud but it did not seem to have been used
Ok, that's unfortunate.
If the iPhone has been disabled because the passcode was entered incorrectly too many times then the only way way to regain access to data is via a restore from backup. Unless a backup was made prior to being disabled, there isn't a way to recover the iPhone's data.
If you have access to a computer she may have owned and it has iTunes on it then it may be possible to use that if she ever synced the iPhone previously.
With the iPhone UNPLUGGED:
Open iTunes on the computer and go to Preferences > Devices.
*Note: If running iTunes 11 or later on Windows, you may need to show the menubar. Then Preferences can be found under the Edit menu.
On the devices tab, it should list if any backups were made that you can restore from.