I think you've achieved what you were trying to do here. I felt both Shivaay and Annika's feelings and I could see with clarity what each of them were going. Whether it was Annika's fear, Shivaay's anger, Annika's wonderment at their poolside moment as if everything that happened never happened...if you now what I mean... Wait, of course you do! You've showed that beautifully in your writing. All the motions were perfectly portrayed while staying true to both of ShivIka's nature.
Please do go through with a part 2, I can't wait to read already.