EastEnders fans are sure they've figured out who DCI Keeble really is, after soap bosses confirmed a "surprise reveal" is on the way.As excitement builds for the upcoming flashback surrounding the Mitchell family, bosses revealed there would be a big "surprise" in store.Now, fans reckon that reveal could be to do with DCI Keeble's real identity – and they seem sure that she's actually Phil Mitchell's sister.READ MORE: EastEnders Linda theories - Mick and Linda exit, Janine murder plot and tragic deathIn current episodes, DCI Keeble has been seen to be a bit obsessed with the Mitchell family, going for them when she can.And fans now think that might be because she's actually related to them, with one person saying: "OK Keeble is definitely Phil's sister.
I'm sticking with it."Another tweeted: "She's his sister, the first Samantha."A third wrote: "The only affair that would fit with Keeble being Eric's daughter would be the one with Maureen Loftus, it ended in 1969.
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