'It is not in my nature to take a dig at someone,' Joanna penned via a lengthy rant via her Instagram stories.
'Phoebe has never joined the Burgess side for previous Christmas festivities,' she said of Phoebe, who was in a relationship with her estranged husband, Sam, 30, for five years.
'Therefore it couldn't possibly be aimed at her! This year was no different to last year on her behalf.'
'My last years Christmas upload I used a similar caption as it was our sons first Christmas, this year we had out daughter join the three of us hence it being the best one yet,' she wrote.
The post has since been deleted.