Though both parties tried to shrug off their feelings for one another after the moment, it's clear that they share an attraction.
Indeed, actors Charlie Condou and Samia Ghadie have both confirmed that the pair will commit to a shock relationship over the coming weeks.
Their respective partners, Aiden Lester Jason Grimshaw - as well as Marcus's ex Sean Tully - will be stunned when news spreads of the unlikely pairing.
With Marcus never previously having feelings for a girl, the jury's out on whether the romance can realistically last.
But in the meantime, we'd like to hear your thoughts on the storyline. Vote in our poll and leave your comments in the box below.