Will anyone be able to access my account if I delete it from my Xbox One S console?

Hello Monk, my name is Khaji I am the independent advisor and I will be happy to help you today.

If you delete your account from your console through its settings, other people will not be able to access your account or your progress in your games unless they know your email and password. If you log in with your same account on your new console, you will be able to re-download your purchased games and resume the progress you made before. This is because progress is stored in the Xbox cloud and synced with your games each time you open them with the same account.

Best regards, Khaji

I was able to recover my saved games by deleting my
account from my xbox console and put it back again.

There is no way to delete achievements from an account unless she were to be able to mod the account.

If you go to "My Account" at the top of this page and then "Xbox360 Profile Protection" you can have your account removed from all consoles it is attached to and require you to download your account again before you can use it. So that would stop her or
anyone else from even being able to access the account because they would need all of the login information.

Anyone got any info on this one? Still locked out of my xbox account. Seem to be able to access it on pc from microsoft account. When i log in on xbox it tells me about information cellection but won't log me in or progress. Can't play games or access youtube.

Correct. On the One X you will have to be online to play your games, but other than that, you will be able to continue playing as you already have been.

And that's also correct about the game pass games.

Once I download the game on my One X using Game Pass, and then download it on their One S, am I free to delete it from my One X and they'll still be able to play it on their One S, or must it remain downloaded on my One X for them to have access?