The only holster that my daughter has found that she can conceal her PPS reliably is the Raven VG2 or a belly band. Most current in style clothing for women, especially younger women, is very snug and tight fitting. It is extremely tough. We literally went through my box of holsters and tried every possible version (the only one I don't have is a sample from JM Custom). Dark Star Gear's clip on one works pretty well for her, but even that is so-so in concealment for her. Certainly for summer months in AZ. With cooler weather coming up, that one may be a good option.
But whatever the suggestions are, don't push her to accept what you think is good. Help HER find the best. My daughter did not talk to me for two days after I kept insisting that she needed to completely change her clothing choices.........