FWIW, if she didn't, he could turn around and say she never objected. Would she have gone into a room with a guy she thought would turn into a rapist? If that's the case, that she didn't think for a moment that the guy would turn into a rapist, then why wouldn't she think telling him no might get him to stop?
Agreed,
Sometimes you are so startled at what is happening you don't say anything.
And it did. Ergo, it's not rape. If the guy stops, by definition the woman is not being forced.
She told Detective Winters that he DID, in fact, stop when she told him she didn't want to go any further.
And why would a guy who intended to rape a girl ask her to go into the jacuzzi with him?