I think it’s that she’s got no content.
She‘s shown off the garden, the baby playing, the baby eating organic pretentious food....
She can’t attempt to be relatable by talking about Ben working, struggling with the baby- because he shouldn’t be working.
she can’t really mention her family, or claiming to not be seeing them as this will inevitably lead to her being caught out.
I think they meet daily for walks. So she will be living in fear her of being spotted or her mum carelessly overhearing a post from the same location!