You struggle of course

She has fully taken you by surprise and she knows that she has the advantage.

You try and struggle free by grabbing at her hand already lodged inside your trousers.

She is aggressive "Get out of your dick, get IT OUT! I want your big fucking dick. Are you going to give your cum to me, or are you going to keep it all for yourself? I want every last drop!"

You have to prevent her from working your shaft. It appears you are making it worse as she seems to enjoy your efforts to resist.

She is going for a quick and early cum. You already feel your balls already tightening, probably from the anticipation all night.