Unless of course it's a habit to go out of the house without one's foundation garments. This things was made and sold to be worn without'em. Why would anyone who cared what they looked like take a chance? She knew what she was doing.
You definitely have a point about the undergarments.
That sort of thing never occurs to me since I would never go out without a bra.
Maybe she did mean it. Kerry does and says pretty stupid things all the time and she is part of his gene pool.