Claiming dependents

Here's my situation. I'm filing MFJ for both my wife and I. Her father used to provide 100% financial support to her mother. She does not work. Since he passed away a few years ago, my wife takes over her father's financial support responsibility to provide for her mother.

 

So my wife supports her mother by sending her money every year.  Her mother does not live with us in the USA. She lives overseas and not a US permanent resident or citizen. She has never been to the USA.

 

The question is, can we claim her as dependent?