And of course tell her to stop sniffing paint tins!

Work through the processes. Look at the restrictive processes involved - how to remedy those. Look at the education both preventative (from the asthma meds side of things) and when symptoms arise. Perhaps look at Buteyko stuff ( Wikipedia reference-linkButeyko method )for education as well? maybe not so useful though if an allergen is causing the asthma.

As gcoe said this is really text book, simple stuff. Break it into the parts and see what physio and common sense could do to assist in a preventative, proactive and treatment fashion.