EastEnders spoilers follow from this week's BBC iPlayer box set. Some viewers may wish to avoid these storyline details, as the episodes haven't yet aired on BBC One.
EastEnders has revealed the aftermath of Dotty and Keegan's shock betrayal this week.
Keegan (Zack Morris) and Dotty will sleep together in Thursday's episode (August 4), after their personal problems collide.
Keegan's marriage to Tiffany will reach crisis point when he discovers that she has been supplying diet pills to his pregnant sister Bernie, while Dotty (Millie Zero) seeks an outlet for her emotions after a run-in with her friend Vinny.
Viewers know that Dotty slept with Vinny last month, but has been determined to keep their relationship platonic.
She's therefore left furious when Keegan interferes and confronts Dotty over her cold treatment of Vinny recently.
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Dotty's day quickly gets worse when Vinny confirms that he has feelings for her, and that their night together meant something to him.
As a confused Dotty hits the bottle, Keegan is doing the same over at The Vic, having had another explosive run-in with Tiffany.
He then heads to Ruby's to pick up his wages, where he has a tense exchange with a drunk Dotty.
When Dotty accuses Keegan of being controlling of Tiff, he replies: "Give me a joke. How was your day? Did you find another guy to mess around and dump when you got bored?"
Dotty responded: "It was fun, me and Vinny, it was just a bit of fun. Trust me, he had a good time. It's just sex. Now you better get home for another row with Tiff, or you can stay and have a drink with me."
Temptation quickly got the better of Keegan who was soon passionately kissing Dotty, as an unwell Tiff desperately tried to reach him.
A guilt-ridden Keegan was left disgusted with himself immediately after sleeping with Dotty, and firmly told her to pretend that it never happened.
The situation quickly intensified when Dotty arrived home to find Tiff collapsed on the floor, following an allergic reaction to her cosmetic procedure.
As Tiff was rushed to hospital, the news eventually reached Keegan, who dashed off to be by her side. Dotty then berated Keegan for missing Tiff's earlier collapse and not recognising her situation sooner.
Convinced he was being punished for his earlier betrayal, Keegan vowed to come clean with Tiff, but Dotty urged him not to throw away his marriage for the sake of a drunken five minutes.
Taking Dotty's advice, Keegan decided against telling Tiff when he went in to see her –instead promising to never let her down again.
"I can't lose you Tiff", he said. "You're my world. I swear on my life, I will never do anything to take that for granted."
These scenes are available to watch now on the BBC iPlayer.
EastEnders airs these episodes on Thursday (August 4) and Friday (August 5) on BBC One.
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