From what I’ve heard, pets tend to adapt to situations better if their humans aren’t fretting and nervous, so I would suggest that you try to behave normally around her, petting her as often as you used to before, playing the same games, etc. If she reacts badly, you can still give her some more space. Maybe she will be, or is already, a bit jealous of you puppy. To avoid this, take care to establish set rules that distinguish her as the alpha. For example, when it’s dinner time, she is served first and you wait until she is finished, then the pup can eat his food. And, whenever she lets you, show her that you like her and think she is a great cat. My mother experienced something similar with our cat shortly after I was born, she was carrying me around in our apartment, and all of a sudden our cat jumped onto her back, clearly jealous that this small human was suddenly getting all the attention he usually got. She then paid more attention to him and everything was alright.