Dear Future Sister-In-Law,
Hi! I doubt I know you yet, but I hope you see this eventually! Before I start, know that you are a very lucky girl. My brother is the most amazing guy that I know (besides my dad of course), and I hope you two are very happy together. However, as a very protective older sister there's a few things I feel you need to know.
For starters, we're going to be best friends. Please expect numerous shopping trips, gossip sessions, girls weekends, and much more. I'll be gaining a sister, which is something I always wanted. This is also a protective measure, since again, I am an over protective sister and want to know everything about you. Don't worry though, I'm a great time and I'll make sure we have a lot of fun together.
Also, I'm the one you should be scared of. We have a very opinionated family, don't get me wrong, and although everyone will tell you my mom is the protective one of my brother, that's only partly true. I am always my brother's biggest advocate and critic. I love him more than anything and even if he loves you, I'm going to need to love you just as much. I'll probably be very intimidating when I meet you, but I'm just a huge teddy bear once I get to know you.
Also, about our family, we're awesome. You couldn't have picked a better family to come into. We're so close, and we will welcome you with open arms. Our mom makes an insane meatloaf, and some really awesome brownies too so you can look forward to those. Our dad is a giant goofball. He is practically our mom's third child. You're lucky my brother and him are so much alike. Oh, and just to warn you you'll have to name your first son after the two of them. (That's a prerequisite). You'll have an amazing time with us, and we're excited to meet your family too.
So Future Sister-In-Law, I can't wait to meet you. We're going to have great memories. I have my speech already planned out for your wedding, so remind me to read that to you. I love you already, so make sure you take good care of my little brother. He was my first friend and the only person who is there for me no matter what. Please love him no matter what, and I'll love you too.
Love,
Your Future Sister-In-Law