After several liasions with Ben, the burden of keeping his own sexuality a secret is getting too much for Callum.
As his stag do gets underway, Callum finds himself alone with Ben once more and it proves to be the final straw.
Callum explodes and lashes out at Ben, punching him hard.
Will this be the end for Ballum? Or can Ben make Callum see if he marries Whitney he'd be living a lie?
These scenes will air on Thursday August 29.
Clearly, something spurs Callum on to visit Whitney on her hen do after the altercation with Ben as he arrives at the E2o with something to say.
Whit is thrilled when Callum gatecrashes, but her mood soon changes when her husband-to-be tells her he needs to speak to her alone.
Whitney realises that Callum has something big to say... but will he tell her the truth about Ben?
Next week she's got a lot on her mind as she worries about Callum's big confession as well as her stepmum, Bianca Jackson, already causing chaos on the morning of her wedding.
Whitney's all dolled up and ready to say I do, but with doubts swirlling, will the big day go ahead at all?
EastEnders airs Monday and Friday at 8pm and Tuesday and Thursday at 7.30pm on BBC One.
How do you think Whitney would react if she knew about Ben? Leave us a comment on our Facebook page @EntertainmentDailyFix and let us know what you think!