Myheartsisters.com can be set to post back to facebook. To find out what your settings are, go to your Facebook page and then
Go to Account Settings (under the Home link - right hand corner)
Then Click on "Apps"
Then the 'edit' link in the 'Heart Sisters' APP area.
Go down to "Posts on my behalf" and select the option that you wish to use.
You can choose Friends, Public, Friends Except Acquaintences, Only Me, Close Friends, or any other list that you have created.
The click the 'close' link to save.
You would have been given the option of choosing "Friends", "Public" or "only me" on sign up but these options can be modified further through the Facebook settings.
