Tiles ceilings are virtually everywhere.
I worked in a plant whose front offices had such ceilings. Turns out they were old asbestos tile squares, and I was put in charge of doing something about them. (Best thing is to cover them in a special kind of paint, which seals up the asbestos, rather than tear them out and replace, which causes more danger when they crumble.)
Anyway, because of my responsibility, I had to be very familiar with where they were and all the details, and it would not arouse suspicion if I removed them or did anything with them, really.
My corner office was right next to the purchasing manager, Maggie, a woman who was probably my best friend in the whole company. Both her and my office had the drop-ceiling type of tile running continuously over the walls, so there was no wall at all up above, just the occasional support column up to the roof.
My good fortune was truly an accident, for I was standing in a chair to remove a tile from my office for a sample to send the contract industrial hygienist for testing to confirm whether or not it was asbestos when I noticed that I could see down into Maggie's office through a tile whose corner was broken off.
Maggie was a pretty attractive women, with a slim build but big boobs, but her daughter, a high school senior, was a super-cute redhead with huge, I mean HUGE breasts, and every day after school, she'd come into Maggie's office and change out of her school uniform into casual clothes before going to her part-time job.
Maggie and Red lived a long way from the plant, and her daughter's job was right on the way from school to work, so Maggie's office, right there on the front of the building, was a convenient place to change.
Convenient, indeed!
In warmer weather, Red would often wear halter style tops, which of course are incompatible with bras, and so I surmised that she would be bare-breasted for at least a few moments when changing for work on weekday afternoons.
Well, I simply told Maggie I needed a sample tile for testing and that the broken one in her office would be best, as the edge of it was already crumbling and posing a possible asbestosis hazard. This was, in fact, true, but, of course, I had other motives. Why not kill two birds with one stone?
She appreciated me looking out for her safety, and I replaced the broken one with an intact one from another part of the ceiling, so that the missing tile space was in a place giving me a direct eye-line from my office to the extra chair beside Maggie's desk. Under it, Red kept the duffel bag with her casual work clothes, and thus presumably right where she would most likely be changing.
I could see the entire circle drive and parking lot from my big office window without even getting out of my chair, so it was easy to be on the lookout for Red just after 3 PM on school days.
As soon as I'd see her, I'd close and lock my door, slide one of the sturdy armchairs into place, stand in it, quietly remove the tile, poke my head up through the hole, and wait.
That first day was a hot one in September, and I was hoping she'd be changing into a halter. I heard Maggie's door shut and lock, Red say "Hi" to her mom, then into view she came, already unbuttoning her white parochial school blouse. Off it came, revealing an industrial-strength brassier, then off came the Mary Jane shoes, the knee-high socks, and the plaid skirt.
Wow--what a surprise--she had on thong panties! Eyes having always been primarily glued to her tits, I'd never realized what a nice ass the heavy wool skirts and those thick, loose jeans she changed into concealed. She had those poochy kind of young buns you just wanted to sink your teeth into.
Her back to me, up came the hands to unfasten the bra's multiple hooks in back, and off it came, leaving deep lines in her fair skin. Turn around, please, turn around, I prayed.
The Boob God granted my wish, for around she pivoted, and there, before my bugged-out eyes, bobbled a pair of, I swear, honeydew-melon-size bazooms, smooth and lily-white, appearing even more enormous on the small, short frame of the young, redheaded cutie.
My eyes popped further out as she kept rubbing them to restore circulation from the confines of the tortuously tight bra, perking up the fire-engine-red areolas and nipples like lava erupting from massive twin volcanoes.