I believe this is aspirin intolerant asthma. Aspirin inhibits cycloxygenase. This leads to more shunting of the arachidonic acid to the leukotriene pathway (excessively), which leads to a bronchospasm.

Aspirin-induced bronchospasms can occur in aspirin intolerant asthma occurs more in adults. Additionally, she experienced this previously with ibuprofen (another NSAID that inhibits cox).

In an asthmatic response, mast cells lead to generation of leukotrienes C4, D4, and E4 (early-phase reaction)