I am looking for an old story about a writer who is a guest at a mansion.
He meets the niece of the lady who invited him but she is kept in rubber bondage almost permanently.
I remember one chapter where the niece baits him into a bondage cape and locks him outside in the rain.
Ring a bell for anyone?
This one, maybe?
The Ultimate Challenge by dianag
https://www.boundstories.net/storiessz/ultimatechallenge.html (https://www.boundstories.net/storiessz/ultimatechallenge.html)
No, I think I know the one you're thinking of, definitely a male protagonist. It was on the Staylace (https://www.staylace.org/) site I think, a couple of chapters long. Can't remember the title or more details but if you hunt around on that site you should hopefully find it. If I have time later I'll hunt around with Google Site Search on it.
It reminds me of an old one with what looked like hand draw sketches
I think it was called something like reluctant heiress or something like that.
Unfortunately I don't have a link.
That is exactly the title, and with that information, I found it on DeviantArt: https://www.deviantart.com/artefoster/art/The-Reluctant-Heiress-777697652
As the author notes there, they put it up on a few corsetry related sites, so I probably found it via a link from staylace.com rather than on the site itself. Was it the one you were thinking of too Daever?
In that case you may have originally seen it on Artefoster's old Yahoo Group Confining Clothes. He moved over to DA when Yahoo announced it was closing the groups