I found it! Here is the link if anyone else wants to read it. https://www.vogue.com/article/serena-williams-pregnancy-vogue-september-issue-2017
I read it and cringed. It sounds like she might want to go hard core now and is trying to convert her muslim-raised husband. She actually used a JW phrase that made me want to throw up a little bit ... "takes the lead"!
Talking about her (then) fiancee, Alexis Ohanian:
“He’s extremely smart but not a know-it-all. He’s curious about what he doesn’t know. Being a Jehovah’s Witness is important to me, but I’ve never really practiced it and have been wanting to get into it. Alexis didn’t grow up going to any church, but he’s really receptive and even takes the lead. He puts my needs first.”