 Mercy learns that she can stay in the UK but feels guilty about the deception , so decides to go back to Nigeria anyway . Fatboy loses his market stall but gets a job selling cars for Max Branning ( Jake Wood ) . He discovers Mercy is leaving , so tries to stop her from leaving but is unable to , and they say an emotional goodbye . Fatboy is distraught over his loss , and eventually decides to move in with Dot . He helps Dot to track down her half sister Rose Cotton ( Polly Perkins ) and helps Whitney when her former pimp , Rob Grayson ( Jody Latham ) tracks her down . Fatboy feels put out when Rose and Cora Cross ( Ann Mitchell ) both move in with Dot . Mercy 's sister Faith Olubunmi ( Modupe Adeyeye ) then arrives in Walford to tell Fatboy that Mercy has had their marriage annulled . Fatboy starts a relationship with Faith ( as seen in series 3 of EastEnders : E20 ) but it soon ends . Following this , Fatboy develops feelings for his friend Whitney Dean ( Shona McGarty ) , though Whitney is involved with Tyler Moon ( Tony Discipline ) . When Whitney and Tyler 's relationship breaks down , Fatboy admits his feelings for Whitney and the pair start a relationship . Fatboy buys a car for Whitney , but she is initially angry , saying she doesn 't want to be owned . However , Whitney relents and accepts the gift . Fatboy notices that Tyler continues to want Whitney , and so warns him off . However , after Whitney gets angry at Lucy ( now Hetti Bywater ) for dancing with Fatboy , Lucy convinces Tyler to talk to her . They accidentally get locked in a bathroom and Fatboy assumes Whitney has cheated on him , so ends the relationship . Fatboy later visits Tyler , who shows Fatboy that the bathroom door sticks , and Tyler says that he is happy for Fatboy and Whitney as a couple . However , Whitney soon feels smothered by Fatboy 's affection , and when he is about to take Whitney away on holiday , she refuses , and when they kiss she says it is like kissing a friend . She admits that she wants Tyler , and Fatboy is heartbroken . He later punches Tyler . He then becomes a regular DJ at R & R , and gets a job at the local fast food restaurant , McKlunkies . However , he is sacked when he stands up to his manager , Nico Papadopoulos ( Aykut Hilmi ) after taking advice from Alfie Moon ( Shane Richie ) . Alfie feels bad so offers Fatboy a job at The Queen Victoria public house , collecting glasses . 
