After hearing those that were with her at CnC speak, I think she had planned to go straight to the hotel. I think Sloot grabbed her when whe was unprepared and tossed her into the car being driven by Deepak. I think they told her they would drop her off at her hotel to keep her from freaking right then and there.
I have heard several interviews with friends, stating that she was waving and laughing from the car.