EastEnders spoilers follow.
EastEnders' Martin Fowler will be left reeling following some news about his wife Ruby Allen next week.
Martin (James Bye) returns home from attending Kush's funeral in Dubai to find that newcomer Zack has taken a shine to Ruby.
Sharon grows fed up of Zack's lazy behaviour and orders him to get a job if he wants to continue living with her.
When Sharon bumps into Martin, she explains that she has sent Zack to Ruby's in the hope he can find some work there.
Martin soon makes his way over to the club, but is unimpressed to see Zack trying to flirt with his wife.
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With Sharon keen to come up with some ideas for launching the gym, Zack is given food for thought when he spots Ruby again.
Zack flirtatiously asks Ruby if they can promote the gym at the club, leaving Martin annoyed.
Zack continues to flirt with Ruby when she agrees to look over details of the launch event.
Having seen this unfold, Lily later asks Ruby if she fancies Zack, but is alarmed when Ruby tells her to stay out of it.
Back at home, Lily tells Martin that Ruby spent a lot of time with Zack while he was away and that he even stayed the night.
Martin is left reeling from Lily's bombshell and heads over to the club in a rage.
Afterwards, Sharon tells Zack that he has to apologise to Martin, but what will Ruby make of the accusation?
EastEnders airs these scenes on Tuesday, May 18 on BBC One.
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