icloud calendar sharing problem

I invited my wife to see my calendar(s) such as work personal etc and works great as I type an event she sees it right away.(no problem) But then i accepted her invite(via email as she accepted mine) to her calendars(she has iphone 5) and while I can SEE her calendars(title of them in calendar listing) I cant see any events in them nor when she adds an event it does not update to my phone.

Note: This is the same on the icloud website. I SEE her calendars(titles) but NO events within them.

Is this an icloud issue or phone issue?

One confusing note: if there was issue with the apple id or simular why then can SEE the calendar? I would think I would not see calendar at all if that was the issue.

BTW I have 3gs OS is 6.1.3 and not jailbreaked or anything.

Whats going on? Thanks for your help

B-Cat