Telling in-laws/parents?

Melle • Rainbow Baby Twins due 8-28-20 🌈🌈

Hi all? I'm wondering when you told your family and when you told how in-laws/baby-daddy's parents? My mom and sister know because I'm super close to them and if something were to happen, I'd need their support (I've had two miscarriages in the past.) I think it would be super cute to tell my hubby's parents on Christmas morning but I'll only be 4w,5d and he's not convinced my mil could keep it a secret until we announce to everyone in the second trimester. I want to give get some credit, but I feel it would be super unprofessional if my colleagues "heard it through the grapevine." I'm so conflicted! I just know they will be so happy to know!