Melody had hearts and stripes in mind, and after some discussion, this is what I did for her:
I used AngelPro Gelly Polish in #21 for the base and #47 for the art. For the index and ring fingers, I painted a heart with a lace border. For the rest of the nails, I added ribbon stickers (available for purchase here) to the striped design. Super sweet!
Later on, I received an SMS from Melody that even her boss had complimented her on the nails. Looks like this is subtle enough to be work-appropriate!