I got caught this afternoon using one of Alicia's sewing needles to scrape a tiny bit of white paint on the reporting marks of a G Scale Covered Hopper I use for Demonstration purposes at work. I can't obviously print white decals so I used my vinyl cutter to cut a reporting mark stencil, applied it to the car, used white paint and a brush to dabble the paint on it and then used her hair drier to dry it really good before removing the vinyl stencil, but being as how the lettering was so small, the centers of the "R", "4" and "9" didn't come out as clean holes, so I looked around and feeling particularly lazy at the moment grabbed what was handy to fix it, a sewing needle she uses for needlepoint.
She came home and caught me red handed. 6 hours later, she's still POed.