Instead of developing a design strategy and making a presentation to her (which normally does not go very well), I invited her to join me in creating a prototype. We created a full size prototype with news paper and tape to visualize our bathroom tile design. By participating in the design process, we created something that both of us were invested in. Instead of suggesting a design, I invited her to create a design by placing the 'accent tiles' on the wall and quickly experiment with multiple placements and layouts.
The end product resulted remarkably close to the original design
Some work-in-progress pictures and finished product pictures to compare the "design document" with the final result. This is the picture at the end of week 1. We referred back to the paper prototype to make some decisions
JLM Custom Tile2138 Quito Road, San Jose, CA 95130-1929