'I love this so much I could cry,' one user commented on the post.
'Don't get over-excited and feed her too much,' he captioned the hilarious photo.
'I happen to see the message, I will just block you,' the mum-of-five wrote.
'I think it's also important to keep it real and share the weird and sometimes not-so wonderful side of pregnancy,' the mother of two said.
"Baby and pump in tow."
Her fifth child's name means 'wealthy guardian of peace and light'.
'I'm on official two-week bed rest,' the 34-year-old tweeted.
'I knew I should have felt joy, but my first feeling was a surge of survivor's guilt,' the former first daughter explained.
"Before I'm able to start feeling the kicks, the anxiety gets the best of me and any little bits of spotting or pain freak me out", the model confessed.
'These two are going to be the best of friends for life!' said a fan.
"She is the cutest," says Simpson.