People talk about the power imbalance, but at the end of the day there are a lot of people who sleep with their superiors because they want to rather than being coerced (explicitly or implicitly). I don't think we'll ever truly know if she was coerced or not, but we know for sure that she kept that clothing.
And I think this is the tipping point for most people. Everyone understands that she may have been a victim in it.