we do not share your data with anyone and there are many ways to control the visibility and storage life of your data here.
but the internet is a public space and you should always assume your data could be compromised.
be smart with your password, use tor or a vpn, and use pgp for sensitive communications.
Try her on a really low dose buddy and I don't think she would have any probs. Good luck tho hope you get her sorted x→