It only takes one nightmare incident before you learn to CYA. I've been shooting fetish work for years and had a very similar experience a few years back - model came back at me stating she didn't realize exactly what we were doing and after seeing the video for sale online wanted compensation for emotional distress. Of course, she was just after money.
Now a detailed contract is signed and the models must watch footage from previous shoots, sign that she did see previous footage and agrees to blah blah blah.
I also tell the girls once it's up for sale it's up for sale. Period. Get married? Get a new boyfriend? It's not coming down. Sign here.
I had another issue with a different model. She was fine for almost 2 years. Then gets married and her husband wants it all yanked AND the husband said she should get a percentage of the sales.
There's models who "kinda" want to do fetish work and there's models who are happy to do it - could care less. I stopped working with the "kinda want to do it" models a long time ago.
In fact, two of my models now all but run my productions - they recruit new girls, set up the shoots, etc...THOSE are the kind of girls you want.
Oh, and FYI, I provide all the outfits for shoots. I've also been hit with "my outfit's ruined."