How do I keep it a secret!!??

Laura

My brother and SIL birthdays are only two days apart and they invited us and a few other friends to a brewery on Saturday to celebrate. They're our best friends and we love going to microbreweries!! (where my beer lovin babes at? 🍻) Anyway, we want to go and celebrate with them, but how do I not give myself away? I'm 6w4d, so not ready to tell them.