S39·E11 Episode 5505 (Thu 14th Jan 2010) (Part 1)

Maisie and Ryan struggled to take in what they were hearing about Mark. The young pair were sick at the idea that they had nearly consummated their romantic relationship when all the while they were half brother and sister. Mark didn't know where to turn and it wasn't long before Nathan showed up and demanded to know what was going on. Everyone despised Mark - and by the end of the day one of them would have killed him.