Hello don.......
She can wear anything she wants actually peopple don't really comment .
, but if your looking for the most acceptable style that would not get stared at then i'd have to say it's modest ,unrevealing clothes....long skirts and sleeves are preferred...also they don't really like trousers....I'm just telling you what i heard from the Qataris i work with...i don't know about the beach..if the social function your going to is all expats then obviously u can wear what you want.lili.