i posted my love for this gun before, but ill do it again.
im absolutly in love with the Beretta PX4 Storm. i have the 9mm (already had a Sig p229 in .40 and a Taurus Judge, so thought now i need a 9mm), but also come in .40 and .45 flavors. For her id say the 9mm for the recoil, but a .40 prolly wouldnt be too bad either. the Storm just feels so good in the hand too, i have paws for hands, so big wide palm but stubby fingers..... also my sister doesnt shoot much if at all really, but will always hold a gun, and then usually say "no i dont like it, it doesnt feel right....". so i made her hold the Storm and instantly held it up and said "Oooooooohhh... this i like!" she still didnt shoot it, but she said thats one she definatly wants to try out.
tho, its probably not the most compact concealable weapon out there, so that may rule it out, and being a $600 piece might be a bit outta her range..... but it is a wonderful weapon i think, and worth atleast a look at.