As we have recently observed, summer dresses often lack pockets and belt loops. Fortunately, some guns are light enough that a belt thrown around the waistline can support a sufficient holster with comfort. This one, made by Simply Rugged in Arizona, works nicely for Kel-tec PMR30.
Combination holster/mag pouch doesn’t make for rapid reloads, but PMR30 does supply 31 shots before a reload is needed. A more important question, in the absence of pockets, is: “Where should she keep ear plugs?”