Thanks for the reply, I agree, there's nothing worse than when you say something is a limit and your Dom/me feels they can make you break it.
My personal limit that I've pushed is public, when I first started, everything was behind closed doors, would never risk anyone seeing.
I then once was in my house just in underwear and had the curtains open, nothing extreme but started to quite like the feeling of someone could possibly see me.
Since then I've explored it more and more, been naked with curtains open for a set amount of time and stripped in the woods, nearly being seen by a dog walker, hiding naked behind trees was one of the scariest but also thrilling things I've done.
But definitely, any limit that changes should always be the subs choice and never feel pressured into doing something you don't want to.