Followers were quick to respond to the bizarre snap.
One commenter wrote, 'What the actual f**k. This makes me uncomfortable,' with another adding, 'I have so many questions.'
Corby returned to Australia in May 2017 after serving almost a decade behind bars and three years on parol for smuggling marijuana into Indonesia.
Ben and Schapelle met in 2006 during a church service in Bali's Kerobokan Prison, where they were both serving time for drug offences.
It was previously believed that the couple would never be reunited, as Ben would not be allowed into Australia because of his criminal history.
But they recently reunited in Singapore before heading to a beach resort in Vietnam for a two-week holiday.
Schapelle has never been shy of sharing pictures of Ben to her social media pages.
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In October last year, Schapelle wrote a touching tribute to Ben, writing: 'Missing this Man.'
'Picture taken back in 2014. A couple months after my release,on parole, He took me on a little trip over to Nusa Lembongan -a small island off Bali- for a few days.Alot of tourists, but hire a bike, journey a little further around the island & you'll find some wonderful hidden beach front gems to stay or even over to the magical place of Ceningan Island.
Here we're at an as yet untouched traditional fishing village, they do alot of seaweed farming to export to Japan also. The owner of this particular hut we are standing in front of is a fit, healthy, weather beaten 105 year old man; was kind enough to take the photo. 😁😁😁😍😍💙'