We need more info, not just on the paint (suggesting it was the only culprit) but on the type of wall, and the prep work done prior to painting. Bubbling is normally seen in latex paints where the drying process of the resins in the paint involves shrinkage and therefore the tendency to 'bubble'. So the culprit may be a shaky layer underneath her paint, which may be caused by cheap contractors grade paint used in new houses. But is yours a new house?
It may be because of a lousy spray-paint job, but was this room spray-painted at all? do you know?
Finally, what do you mean by bubbles? soap-bubble size? about 1/4" or quarter-sized bubbles? Lots of tiny, tiny bubbles or just a few big ones.
See, just because a paint 'bubbles' doesn't mean the paint isn't a quality paint...most of the quality of a paint job comes before the job even begins and extends to the abilities of the painter, the equipment used and goes through the formulation of the paint itself. :yes: