Hera and Kanan

Is their relationship purely platonic, or do they have sexual relations? It got me thinking when I saw the preview for Homecoming. Kanan wants to look his best for Hera's father.

They have feelings for each other, that much is obvious, but they try to keep things professional.

I think it's possible they even had a relationship or a fling before they started getting more involved in the rebellion and got a bigger team.