Mother enjoys a joke

I can't take a good picture of my mother simply by pointing a camera at her. If I do so, she get worried, purses her lips, cocks her head to one side and produces a face that is nothing like herself.
 
The best thing to do is tell her a joke.  So I did
 
If you want to know what the joke was - it is one I think I heard from  Lionel Blue on Radio 4 years ago:
 
" The Pope, the Archbishop of Canterbury, the Chief Rabbi, the Dalai Lama and Mother Theresa all went into a church. And God said...

 "Is this some kind of joke?"

As you can see, she liked it