Bless her, I hope it helps her. If she has problems taking it you could ask for a spacer as well.
http://www.asthma.org.uk/all_about_asthma/medi cines_treatments/spacers.html
I hope she can get comfy enough to have a good sleep. I find the V pillows or a beanbag are great and wrap a throw round my shoulders as it is easier to breathe that way.
When people have mild asthma attacks, getting them sat down against a wall to straighten them out so to speak is helpful to getting the airways to open more to get more air in so similar if she is wheezy.
Breathing through something can also help (like a paper bag when someone has an asthma attack).
Have they listened to her chest? Usually they could hear a rattle if there is an infection in there.
If she likes cordial, it is nice and soothing made with boiling water then left to cool.