You were always super welcoming to me even before I became your brother-in-law. I really appreciate that. Happy birthday and thanks for making me feel like part of the family.

Happy birthday! I hope you have an amazing day and I just wanted to take this opportunity to say that I feel honored that I get to be a part of your family.

I know our family is a bit weird, but we are happy you are a part of it. Happy birthday brother-in-law!

Thanks for always being there for both of us. You are the best brother-in-law a couple could ask for! We hope you have a ridiculously awesome birthday!