I guess he is just trying to ask for some other advices (beside making a trip down to the AD) from the watch community before making the final judgement.
There's always options to get anything solved.

She tried to wind the watch today (as usual) after a few days to keep the movement going but felt resistance from the winding knob.
You can always feel a resistance when you have fully wound your watch. Do not try to force it further as it will damage both the mainspring and component in the escapement
Did your wife overwind it before that?
Can the watch still be wind?
Can you explain more in details what you meant by 'stopped functioning'?