My wife finally wore a pj top without a bra when someone else was at the house again. It's normal for most women, but extremely rare for her. (She had a period where she never cared, but that was so long ago and the past few years have been extremely careful and reserved.)
Neighbor dad came over last night to have me help change the guitar strings on his daughter's guitar since they tie on and guitars are my jam. My wife was already wearing her pjs and I told her he was coming over in case she wanted to put a bra on like she normally does when someone is about to pop over, and she gets really mad when I don't warn her. She said she wasn't going to leave the bedroom so she didn't care.
Well, when he was sitting with me in the kitchen, she DID leave the bedroom for something to drink. She even stayed and talked with us while her very thin pj top showed off her puffy areolas and nips poking out, and you could vaguely make out the size and color of her huge areolas. You could make out what seemed like the shape of her breasts, but I know that it wasn't that precise.
Not unusual for most women, but this was pretty exciting for me to see my wife not care. The neighbor pretty much just stared the entire time like a deer in headlights.
After she left, I said, "Wow, she is comfortable with you! She never lets anyone see her in pajamas." He said, "Oh my wife wears stuff like that all the time." I said, "Even if I were to go to your house to change strings next time?" He said, "Ya, of course." I said, "Neither of you would care if I can't help but look a little?" He said, "No we wouldn't think anything of it." I really wanted the conversation to go further, but I left it at that. (Last time I tried to push a conversation with someone who I didn't know all that well that I was sure would go further, it turned around to bite me.)
When I went upstairs, my wife could tell I was turned on. I told her to leave her pj top on while we screwed, and she eventually asked why, and I said it was so I could pretend I was the neighbor staring at her while wearing the top, and it made her have a very intense orgasm.
So, I think that is a sign that she liked it, too!