I'm pregnant! But so is my sister lol

My husband and I started trying to have a baby after we found out I wasn't ovulating and would need help trying to conceive. Took a pregnancy test a week ago and it was positive but very lightly. On Christmas day, my doctor had me go in again for blood work and confirmed I was on Saturday! Well on Friday, my sister came out with the news that she was pregnant as well ? (I hadn't told her I was pregnant yet). So the point of this story is that I want to tell my parents in a special way :) and so does she! She wants us to announce together and it seemed like a great idea but now I'm not very sure I want to do that! What are you alls opinion? Also what are some creative way to tell them? Thank you :)