This is not possible at all, she is just threatening you so that you behave well when using the social media.
software used to send, receive, forward, store, print and delete messages
clearly, what you should do is either change the password to the account or delete the bad messages so that your parent wouldn't be suspicious to check the messages on your account or online.
In Facebook there is a notation for new messages. After viewing these messages it is possible to delete them individually or return to the list and delete all. This is done by using the corner x.
click delete
It's not possible unless you delete your account.
Delete the email.
delete the email
Delete the email
password delete
When you see a message you want to delete, click on "Delete" on the right of the message.
On forums, click edit post then delete post On messages, click delete
Delete your password from the Control Panel