Aww, you're more than welcome, nosebud!
I love that you are having her sample No.5 and Shalimar! Two of my faves. If it turns out she likes No.5, she absolutely must try Tauer's Miriam from the Tableau de Parfums series. Think she should also sample his Zeta, very summery. If No.5 feels a bit stuffy to her, see No.5 Eau Premiere, which is more citrusy and relaxed. If she likes Shalimar, have her try Bulgari Black and Miller Harris' Fleur Oriental.
Cool Water makes me think she may like the Hermes Jardin line, especially Apres la Mousson and Sur le Nil. She may also like Kelly Caleche from their regular line. All of these are often available on Amazon at a discount. And the Chanel Cristalle line may appeal to her summery tastes.
If she really doesn't get on well with heavier scents, no worries! I wear my lighter, greener scents year round. In fact, they make a beautiful and striking contrast with cooler air. Keep us posted as she works through this new round of samples; her opinions will trigger even more suggestions!
Thought of another Tauer- Vetiver Dance. Very pretty and floral but with enough depth for any season. I'm sure I'm going to have suggestions popping into my head all day now!