My house looks over a busy street and the kitchen has the best view.
I have a large beam overhead with cast iron hooks used for hanging cast iron pans. Before my girlfriend came over I walked down the street and checked back to be sure nothing in the kitchen was visible even if headlights shone into it.
First I tied her wrists together and hooked them on a hook while she was fully clothed. A check showed she was invisible.
Next I stripped her and left her hanging naked from the hook. She could see cars going by and when their headlights struck the windows the illusion was that they lit her up like a spotlight.

That's how we got started.

Later I tied a ring to her hair and we walked around a shopping mall with it plainly visible. Got a few grins.