Do I Have To Tell My Business Partner I Got Married?

Info: My partner of many years & I have decided to get married. We want to do it elope, out of state, & tell no one. Further down the line we’ll have a wedding with everyone but as for now, we might book a vacation & get hitched!

Now here’s my question. I’m in a business with a family member, but like I said, I don’t want to tell anyone, including said family member. Do I have to tell them? Will it change the way we file taxes with our business? Or would we just file like always & then my personal we would file jointly?