Looking for exciting ways to tell mom and sister!!!???

Kendra • Happily Married!! Two beautiful little girls :)
Looking for a exciting way to tell my mom,sister,and mother-in-law. I was going wait till Valentines Days and give her a onise (cause I always get her a valentine gift) but I don't know if I can't wait that long. I'm think I'm going tell them around 10 weeks (I'm 6 now) give me some idea ladies! I was it to be a shock and surprising!!!