In this clip,Jack threw a jab at his ex Paige and his new Adam weeks after deciding to quit the ITV2 dating show.
During his Instagram Live on Sunday, Luca read out questions from fans. "What do you think of Adam and Paige's relationship?"
Luca Denying Split Rumors interjected and said in a mocking tone.
The two then burst into laughter atLove Island's annual Meet the Parents episode at a reference to Paige's mother's harsh words.
Samantha, a Welsh paramedic mother, said: Your ways with Jack were different, but it looks a lot different with Adam.
However, an Instagram Live clip posted to Twitter and popped by Jack's seemingly petty demeanor.
Returning this year with an epic twist, the Series 4 bombshell retweeted the clip along with a savage comment.
Jack's Instagram Live commentary came just hours before the Love Island Reunion aired on Sunday, but Laura Whitmore apologized to viewers for her absence, prompting the rugby player to return to the annual rally.
Remi, who shared the video on Instagram, wrote a lengthy comment, giving her thoughts on the pair. .
In his post he wrote:
"Honestly, I don't know why they weren't kicked out. It's not a joke, it's a clear sign of bullying."
He continued: "I I want everyone to see all the crap I've been through... I never knew what was really going on."