She could have initially consented to something, but changed her mind on that something when she realize that it wasn't good, or that the partner ramped things up out of her expectations.
Or she could be lying like in the Columbia BDSM case I mentioned. Note, prosecution must prove his guilt beyond a reasonable doubt. "She could have" doesn't really come close to that.
Additionally if there is testimony about the roommate not being allowed in, that'd be additional evidence that something bad was going down.
I am confused. Do people usually allow their roommates in to watch during sex?
Of which you'll just say 'the bitch is lying'.
No, it's you who categorically assumes that the "jerk is lying". I think both are possible and I have no idea who is telling the truth but what I do know is that when it doubt we have to go with the defendant, not the accuser.