Fair warning: he will probably try and tell you the worst jokes. He's super opinionated so don't think you'll win every argument, but he will love you the most.

Dear newest sister,

I am going to be the first to cheer you on. I never thought I'd have a sister, but yet here you are. You weren't just picked for my brother — you were picked for me because let's face it, if I didn't like you it would be a problem. You are my built-in best friend. You are my new partner in crime. I hope you have enough stamina to keep up when I joke with him. We are a super sarcastic family, so you must be quick-witted in order to keep up. You matter to me because you matter to him. I will be here for you if it means that you are better for him. I'll remind both of you to get it together on those rough days. We will get to know each other because your thoughts and feelings matter to me, you must be special for him to let you in. I promise I will supply all the baby pictures and dirt for you to tease him with for the next eternity. I'll help you navigate through our family functions; tell you the ins and outs of our childhood when they don't. I'll prep you with all the questions that well-intentioned people may ask and I'll see your face that tells me you've had enough, don't worry, sister to the rescue.

You must be pretty patient because my brothers can have a short fuse. Even though I love them they can be jerks, let's be honest. They are independent but they need a soft place to land after their stressful days; they need someone to feed their brain.

They're the most important. I have never had men who protected me more, love me longer or are more consistent than they have been. I am the youngest so that means that they knew me from my first breath, I watched them grow and mimicked them as all siblings do. I annoyed them with Barbies and nail polish, they taught me about cars and Pokémon. I looked to them for advice and I would take a bullet for them any day.

Thank you. Thank you for loving them, for making them feel secure. Thank you for not taking advantage because they are so kind and big-hearted. Thank you for seeing their value underneath that hard exterior. Thank you for showing them unconditional love. Thank you for singing in the car, laughing until your side hurts, holding their hands through the greatest and most difficult obstacles. Thank you for changing your last name to match theirs. Thank you for reminding them that they are a gift to the earth, for being all that they need. Thank you for giving them the chance to start their own families.

You're one of us. Get ready for the long nights of heart-to-hearts, random dance parties and the best friendship you've ever known. I never thought I'd get a sister, but I'm so glad it's you.