You don't need all of that email setup. And I think those are all POP email setups, given your settings comments.
It's all much easier with IMAP email - you can all have all of the emails pushed to every device with no worries about downloading onto one device preventing it being available to other devices. Whatever you do to an email on any one device is mirrored on all of the others, including sent messages. You can do all of that in apple mail.
You could have
[email protected] on your devices,
[email protected] on all of hers and
[email protected] on all of both of your devices.