Thankfully, the mystery hand wasn’t a ghost, with Robyn revealing the miniture fist belongs to her four-year-old daughter, Ripley, who interrupted her in the middle of an at-home photo shoot.
'When you're trying to take 'model polaroids' and your baby has another idea,' she captioned the photo.
Robyn also highlighted the visible stretchmarks on her stomach, declaring how proud she is of her natural body.
'Here's my body in its natural state, I love a good fake tan now and then but here's my skin in its natural glory,' she continued.
She also added the hashtags: '#nomakeup #modelife #mumlife #momlife #naturalskin #robynlawleyswimwear #stretchmarks'.