The former reality TV star became a mum in June, and has been in a cloud of loved-up domestic bliss ever since.
In new pictures shared this weekend, the yoga instructor looks blissed out as she kisses Arlo on the mouth.
Alongside the heartmelting snap, proud mama Billi simply wrote: "Mummy's Boy."
She also shared a photo of the little tot giving his gorgeous mummy a big smile - awwwww!
Billi captioned the photo: "Happy Boy Laughing At His Mummy."
The former TOWIE star shared a photo of a family dinner with her son and fiancé Andy Carroll, where footballer Andy can't hide his happiness at being with his perfect little family.
And Billi is all smiles as she spends the day with "my boys" at the plush Chewton Glen Hotel, New Milton.
Billi and Andy welcomed their first child together on 15 June.
The couple first announced they were starting a family together on Christmas Day last year. Their baby joy came just two months after Billi and Andy revealed they are engaged.
Andy had proposed to Billi while the pair were on a romantic break in Rome.
Keep the cute snaps coming guys!
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