'That's what they all say, but you know she's just really seeing whether it works out or not,' he teased.
Spanish-born Elsa previously opened up about her surname – she was originally born ‘Elsa Lafuente Medianu’ to the Herald Sun last year.
'That's my Spanish name. We actually have two surnames as one, which is weird - your mum's and your dad's,' she said.
As her acting and modelling career started to take off in Spain, Elsa adopted the professional surname Pataky in honour of her grandmother Rosa Pataky.
She added: 'My grandfather was a theatre actor and I admired him so I started to act as well. I thought, "You have to have something that really sounds different."
'My grandma's surname in Spanish was a little different, so I took it from her and I love it. Pataky - it's actually Hungarian but everybody think it's Greek.'
Chris and Elsa were married in 2010 after a whirlwind romance of less than a year.
They share three children, daughter India Rose, seven, and twin sons Tristan and Sasha, six.