To combat the speculation, Serene posted a mirror selfie with Brandon on her Instagram Stories, proudly showing off her Neil Lane bling on her left ring finger.
Along with the photo, Serene wrote, "Y'all when I model, sometimes there's gonna be a shoot without my ring on, especially if it took place before the finale so before I could wear it out."
Brandon and Serene shared in November how they were already thinking about wedding plans given their engagement had filmed in Mexico about five months prior.
"We do have some things in rotation," Brandon said at the time. "For now, we're just enjoying the moment and truly enjoying our engagement."
Serene said she and Brandon would be open to tying the knot where they first met.
"I think we would get married in Paradise if our families were there!" Serene shared.
"It is such a special place to us and having our families there in the place where we got engaged and thought about getting married would be so special. We are definitely thinking about it!"
Brandon noted that he and Serene navigated things "well" when they had to hide their relationship from the public while Bachelor in Paradise was airing on ABC. He said they always manage to "lift each other up" whenever necessary.
On Bachelor in Paradise's finale, Serene told Brandon that they had a life-changing love, something more than she ever could have expected or dreamed about. She said she felt seen and understood more than ever before.
"I found my best friend, my missing puzzle piece and my soul mate," Serene shared with Brandon on the final day of filming. "I love you so much and I'm never going to take that for granted."
In reply, Brandon shared how "The Split" twist made him realize that he never wanted to spend another day of his life without her. Brandon gushed about how he loved her in every sense of the word and she's an "everlasting spark" that hit him so hard.
"I will love you until the end of time. I will love you until my last breath, and I want to start forever with you," Brandon said. "And that starts with making you my forever."
After Brandon got down on one knee and Serene said "yes," Bachelor in Paradise host Jesse Palmer joined the pair on the beach and revealed how he'd been ordained and could marry them right on the spot if they wanted to be spontaneous and seal the deal.
However, the couple chose not to get married since they both want their loved ones to attend the wedding.
Brandon confirmed on the reunion in November that it was love at first sight with Serene and she's the "most perfect" woman for him. And Serene said she was so grateful for Brandon, who yelled, "I love the sh-t out of you!"