"Lets be Batman and catwoman for Halloween! Me - Batman? Got it... and then she looks good and I'm LEGO Batman," Jonathan captioned the photo of the couple all dressed up in black.
And Jessica commented the following on Jonathan's Instagram photo, "Cue LEGO movie soundtrack.... Everything is awesome! Everything is cool when you're part of a team! Everything is awesome, when you're living out your dream!"
Jonathan and Jessica met on Season 6 of Married at First Sight, on which Jonathan wed a total stranger, Molly Duff, and Jessica served as one of the show's matchmakers and relationship experts.
The MAFS season married singles who lived in the Boston, MA area and began filming in late Summer 2017. Its finale aired on Lifetime in April 2018.
After Jonathan and Molly got a divorce, Jonathan and Jessica sparked up a romance.
"We have [set a date]. But we've decided not to share the date," Jonathan told Monsters & Critics in a recent interview.
Jonathan did reveal, however, he will marry Jessica at least a year from now and their wedding will take place at Ventosa Vineyards in New York, according to the website.
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Ventosa Vineyards is a beautiful winery located along the shore of Seneca Lake in the Finger Lakes region of upstate New York. Comprised of eleven long and narrow lakes that were created by glaciers, the Finger Lakes region is famous for its many wineries.
According to its website, Ventosa Vineyards specializes in vintage dry red wines and its buildings and grounds are designed in a Tuscan style similar to what visitors would see in the Tuscany region of Italy.
Jonathan and Jessica live in Massachusetts but enjoy taking road trips around New England and New York and reportedly fell in love with the winery during a previous visit.
Jessica, a licensed psychologist, is an associate professor at the University of Massachusetts Medical School in Worcester, MA, which is about 45 minutes west of Boston. Originally from Ohio, she has three children from a previous marriage.
While Jessica had previously appeared on Seven Year Switch, another relationship show that also aired on Lifetime and was produced by MAFS's Kinetic Content production company, Married at First Sight's sixth season was her first season as a member of the show's expert panel.
After news of their relationship emerged last year, critics accused Jonathan and Jessica of engaging in an "inappropriate" romance that reflected poorly on Jessica's professionalism and credibility.
In addition to helping match Jonathan and Molly, Jessica had also served as one of their relationship counselors during Married at First Sight's sixth season.
Jessica, however, has insisted she did not have an actual client/therapist or doctor/patient relationship with Jonathan at any point during production and outside companies are hired to conduct the psychological evaluations of Married at First Sight's cast members.
Jonathan and Jessica's backstory was further complicated by the fact that Married at First Sight's sixth season had also shown Jessica being unusually confrontational with Molly when she met with Jonathan and Molly after they had a blow-out fight that ended up being the end of their marriage.
"I understand you don't like my honesty, but I don't like your lies," Jessica told Molly, saying she didn't believe Molly's claims that the couple's fight had been the first time she had spoken to Jonathan in the belligerent manner shown in a video Jonathan had recorded.
But Jonathan told Monsters & Critics he actually wasn't a fan of Jessica when the pair was filming Season 6 of Married at First Sight.
Jonathan insisted they had no chemistry at the time, and he even recalled himself saying at one point, "I hope I never see that woman again!"
Jonathan claimed in his interview he and Jessica only met a couple of times during the show and they only formed a bond after filming wrapped.
"Once I got to know her, I realized how great she was and fell in love. That's why I locked that down!" he said.
Jonathan and Jessica got engaged shortly after People reported Jessica was leaving her role as a relationship expert on Married at First Sightafter appearing on three seasons of the Lifetime reality series, as well as its Married at First Sight: Honeymoon Island spinoff.
During his interview with Monsters & Critics, Jonathan also revealed he had originally been cast forMarried at First Sight: Honeymoon Island, however he ended up not participating because he and Jessica had begun dating by the time the MAFS spinoff began filming.