Made In Chelsea star took to Instagram where she posted a snap of herself with their little girl looking distraught while resting her hands on her mother's blossoming baby bump.
The star is heavily pregnant with her second child with husband Hugo Taylor. Millie wrote alongside the heartbreaking shot: 'It's been a rough few days in the Taylor household, Sienna has really not been herself. 'I put it down to having a cold and possibly teething as she kept crying and pointing at her mouth, by the end of the week she was refusing to eat or drink anything, even the sight of her milk bottle would make her scream so I knew it was something more.
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