Jessika is currently married to Mick Gould while Dan is betrothed to Tamara Joy.
In a teaser clip aired after Tuesday night's episode, MAFS meltdown queen was seen shamelessly flirting with the intruder groom at a cast dinner party - despite their respective spouses sitting just metres away.
Jess has become infamous for stirring drama on the Channel 9 social experiment, and the blonde bombshell lived up to her reputation by telling Dan: "You're a very good looking guy."
The footage hints that the feeling is mutual as the father-of-one is heard saying: "Sometimes you just have to go with your gut."