Taking to Instagram, Billie treated fans to a new photo of her sister Sam's baby and was pictured enjoying cuddles with him in her black and white snap.
Making sure to keep his face hidden, Billie held Sam's little one close to her chest, before paying a sweet tribute to him alongside her post.
She gushed: "My beautiful nephew's evening out to aunties for dinner ☺️ ... You are so precious to me my little darling I love you so much ..."
She then addressed her sister Sam, 25, telling her: "@samanthafaiers1 I am so in love with being an Aunty to this little pickle .. Loved our cuddles this evening."
Sam first welcomed her son on 29 December 2015. She chose to announce her baby joy on Instagram, treating her followers to the first photo of her little bundle. In her snapshot, she and her boyfriend Paul Knightley can be seen clucthing onto the finger of their teeny tiny newborn.
So far, Sam is yet to share what she and Paul have decided to name their baby boy, and has kept details of his birth, including the time her son was born and his weight private.
Instead, she simply said: "Welcome to the world our beautiful baby boy. 29.12.15"
Sam has since thanked everyone for their congratulatory messages. She celebrated her birthday two days after giving birth, tweeting becoming a mum was the best birthday present she could have asked for.
Billie, of course, was one of the first to send Sam her well wishes after her son's arrival.
She said: "I am the proudest sister and auntie in the world @samanthafaiers1 and Paul ... I cannot describe my love for my beautiful nephew ... I love you all so much and I can't wait for all the wonderful time we are going to spend together with him and Nelly ..."
Sam and property developer Paul have now been dating for over a year, but didn't choose to go public with their romance until April 2015.
For exclusive competitions and amazing prizes visit Reveal's Facebook page NOW!