[ModelT-MsDollie]

Imagine wearing this in public. Now imagine with the top button unhooked and bending over!
Dollie has been doing this over 50 years, as a skinny little girl until now. She had a half dozen of these blouses in many pastel colors. All but this one wore out from pulling up and down and her being fondled.
I removed the upper buttons on them all so she couldn't button them up any farther.

This photo is at a large bike event with the top button unhooked. Bending, walking, sitting and her tits would soon be fully exposed. A strap could be slid down her shoulder to also let her fall out.
Also she would unhook just the bottom button or the bottom and next lower button leaving only the top one hooked. At least this kept her in most of the time.
These blouses were our favorite flashing tops and worn in many crowded and secluded places over the years. There were times when people walked up to warn Dollie her tits were out. We thanked them, she buttoned up, and another accidental game was played.

This or another shorter skirt is what Dollie has been wearing to tease truckers on the way to the glory hole shop.