And Keanu reckons he knows who the blackmailer is. But is he correct?
When Sharon insists that they can't be seen together in public, Keanu is relieved to hear that Phil has no idea about what's going on.
However, after a suspicious meeting with Linda, Sharon is alarmed to hear that Phil has been in touch. What could he want?
Later as Sharon slips off to meet Keanu they struggle to keep their hands off each other and Karen spots them kissing in the alleyway as she leaves The Vic.
Confronting her son on what she saw, Karen is horrified to learn he’s having an affair and that someone knows about it and is blackmailing them.
Despite Keanu’s pleas to stay out of it, scared for her son's safety, Karen pays Sharon a visit to have it out with her and pleads with her to end it. After talking to Keanu, Sharon makes her decision.
Elsewhere, Jay gets the wrong end of the stick when he confronts Keanu over his odd behaviour and as they talk, Keanu has a worrying thought about who the blackmailer could be. Determined to confirm his suspicions, he sets them up to find the truth.
And when his suspicions are confirmed, Keanu rushes to tell Sharon, whilst Karen does her best to distract Keanu from what’s happened.
EastEnders continues Mondays (8pm), Tuesdays (7:30pm), Thursdays (7:30pm) and Fridays (8pm) on BBC One