Hello, Jessica Faust!
It sounds like your bookkeeper may be running Mountain Lion. The following article has further information about the 'Share' function in Safari with Mountain Lion. Hope this helps clarify things.
Email a webpage with OS X Mountain Lion
- Open Safari if it is not already open.
- Click the Share button, and then choose “Email this Page” from the pop-up menu.
You can choose what to send from a pop-up menu in the New Message window that opens in Mail: Web Page, PDF, or Link Only. You can also choose to send a Reader version of the page if Safari detects an article on the page, even if you’re not viewing the Reader article. For instructions, see this help topic:
You can also email a webpage by choosing File > Share > ”Email this Page,” or you can email a link to the webpage by pressing Shift while choosing File > Share > ”Email Link to this Page.”