Crossed wires

A customer calls with a question about a visit and asks:

Mum: "Do you have any pictures of the venue on your website?"
Me: "Yes, are you on it now?"
Mum: "I'm looking at it, it's where I found your number."
In the background, for all of the next stage of the conversation, can be heard a plaintive and persistent "mum? mum?... mum?... Mum!" throughout which the mother stoically carries on.
Me: Gives instructions for what to look for and click on
Mum: Asks some questions to clarify, mutters to self.
Background: "mum?.. Mum!" 
Repeat this about 3 times.
Background: "MUM! YOU'RE ON THE WRONG WEBSITE! THAT'S WHY YOU CAN'T FIND ANYTHING!"
Mum: ...Would you mind speaking with my son?...

Conversation with teenager fixes everything in a couple of seconds.