outlook calendar sharing

Do you want her to view the 4 calendars? If not you have to go to the calendar of the individual users and take her name off the permissions list. Do this by right clicking on calendar, go to properties, go to permissions, select her name then clickremove.

If other people's calendars are showing are showing up on hers, that sounds like she is also a delegate of those people. You would have to go to the options of that users Outlook to take her off the Delegate list. Tools>Options>Delegates>Remove.

Let me know if this helps or if I can help you further. Maybe you can explain a little more if I didn't understand.