However, it was a little too late and fans couldn't believe Beck's original claim that the man was her brother.
One such fan was former Bachelorette Georgia Love who shared a photo to Twitter of Game of Thrones characters Cersei and Jaimie Lannister - a brother and sister from the fantasy series who have an incestuous relationship.
"Exclusive new pics of Bec and her brother," Georgia cheekily captioned a still from the show.
Georgia's post went down a treat with her followers who replied with several laughing emojis.
"Hilarious!!!" one exclaimed.
"Ha ha! Gold!" laughed another.
"Relax it's just my brother," another wrote, alongside the infamous photo of Angelina Jolie and her brother James Haven kissing at the Oscars in 2000.
Beck meanwhile has shared her first Instagram post since the bombshell finale, but there were no digs at her former co-stars to be seen.
The reality star uploaded a glamorous photo of herself posing with her back to the camera on Sunday night.
"Wishing everyone nothing but the best, in their search for love," she wrote alongside a heart emoji.
We’re unpacking all the relationship, sex and dating woes of this season’s Married At First Sight stars in our juicy new podcast, Love In Reality. Listen, like and subscribe below!