???? it is not outside the standard of care at all. it is extremely common for psychiatrists/therapists to provide psychotherapy over the phone but she shouldn't do it for free. would not be screwed in a lawsuit either, its very difficult to be successfully sued as an outpatient psychiatrist and telephone therapy would not de facto be regarded as negligent.
However, you cannot provide care for patients across state lines if you're not licensed in that state. The only way you could get around this is by providing "psychoanalysis" which outside of new york state, does not require licensing. But you certainly cannot provide pharmacotherapy etc across state lines. There are some therapists who provide skype therapy OOS by saying it's "psychoanalysis." Probably a little sketch, but it's certainly done.