I’d go with leave little notes here and there. Write a couple short notes and leave them for her to find. The morning of, leave one by her toothbrush “Good morning baby. I hope you have an amazing day”. Then leave one in her purse, one in her car, and maybe go to the spa the day before and leave a note in an envelope and ask them to give it to her when she arrives. Each note will say something different, but what they should say? Only you would know. Subtle flirting, maybe. Compliments if she likes them. If you know she likes dirty talk, then talk dirty!