How long has she had it?
Miles?
Most likely she is not getting all the way into gear.
I have noticed in my 6 speed when I am at a stop putting it in first, I have noticed 2 clicks as pushing all the way into first.
Put 20k - 25k Miles on car since I noticed.
Has the oil been changed in transmission?
If not you can do it yourself easy so when you pull the drain plug out look at the magnet on the plug for shavings, and you can inspect oil for shimmer.
Some shavings are fine but if a excessive she might have rounded the gears.
Which she can still drive it but just needs to be more careful shifting