As the executor, you have the duty to gather the assets, itemize them for the estate, have them appraised by the estate appraiser, to prevent waste occurring to the assets, pay the estate expenses. The duty includes reasonable access to the assets. If sister does not allow you reasonable access, you will need to petition the court for an order for access. Reasonable access, generally means 8am to 5pm, Monday to Friday. Have the estate attorney draft a letter to her to set a time for access, before petitioning the court for access, which may include a mediation as to time, and date.
Answered on May 16th, 2013 at 8:51 AM