Want to add privacy to light filtering Roman shades

Hello all! We had light filtering shades installed earlier this year and opted for light filtering for our first floor living room and kitchen area. They are installed on the inner part of the window sill. Now we’re kicking ourselves as we’d like to add some privacy and maybe add a layer so people can’t see inside the house when the lights are in the evening.

What would you do? We’re thinking some sort of inner pull down type blind? Or roller shade?

Have you guys bumped in to this and wanted to do the same? If so, what did you do?

We don’t want to go through the $$$ and have them change and reinstall, at this point we’re willing to do the work.

Help!!