Hubby wants to tell his dad. I want to wait a bit...

Kelly
Just found out this morning that we're pregnant. 
Due around the 15th of May 2017. 
Oh wants to tell his dad. 
I want to wait a little longer. 
We actually get married on the 24th of September and I'm gonna have to tell a few people as they'll be suspicious when I'm not drinking. 
What to do?!?