[piasa]

If she was involved in a bondage chat group, what did she expect?

[Eagles6]

Yeah, sorta sounds like her fantasy came true.

Maybe that's why she didn't leave when she had the chance.

[Maigrey]

She expected her "No, stop" to be respected. When he didn't, then it became criminal. It's a breach of contract between the parties, and that kind of breach is discussed in advance.

But then have you respected someone saying No and stopped? Probably not, having been taught that what you want only counts.