You can bring a legal action against the "estate" and the personal representative both seeking to hold the PR to her duties under the terms of the will and also under her "fiduciary duty" (the law-imposed duty of loyalty to the beneficiaries, as well as to use "reasonable care" in discharing the PR's resposibilities). As persons who likely or presumably would inherit (and who *would* inherit under "intestate succession" if there was no will), you have "standing" (or a legal right, based on having a sufficient interest in the outcome) to bring such a legal action. In such a legal action, your sister can be required to produce the will and also justify her actions. If a court finds that she is violating the terms of the will, or violating intestate succession if no will, or breaching her fiduciary duty through lack of loyalty or care, it can order her to do the things she should, to pay the estate some amount of compensation (to then be distributed to the beneficiaries), and/or remove her as PR. A probate attorney would be very helpful in bringing such a legal action.