I'm completely unsurprised by what Ausiello seems to find shocking (this has happened before). When Dexter Season 5 opens up the fallout from Rita's murder by the Trinity Killer is being dealt with.
Two of the big questions as we were left hanging off the cliff at season 4's end was: What's gonna happen to Dexter and Rita's children and what's gonna happen to Dexter?
I didn't think the show would take the cheesy way out and just plunk Rita's kids Astor and Cody with their grandparents and maybe have Dex do single serial killer dad duty with his and Rita's son, Harrison. Also, there's the little matter of Dex being the spouse of the victim which makes him a prime suspect and possibly not having much say in his children's welfare-- at least initially.
As we know, with wife Rita now dead Dex's only close relative is his beloved sister, the most un-maternal choice one could imagine, sister Deb. And that's what the spoiler is. The kids go to Deb and they all move into Deb's (formerly Dexter's) apartment on the harbour .
Q: I can’t go another week without getting some Dexter season 5 scoopage!
Ausiello: ... You’re never going to believe who ends up caring for Dexter’s three motherless children. Go ahead, hazard a guess. Dex’s in-laws, you say? Wrong! It’s Deb! New showrunner Chip Johannessen tells me that in the wake of Rita’s brutal slaying, Dex turns to his sister (played by Michael C. Hall’s real-life spouse, Jennifer Carpenter) to help care for the kids. And if that’s not problematic enough, all five of them will move into Dex’s old (and rather teensy) apartment! “It’s partially funny and partially not,” says Johannessen. “Deb is not exactly the most maternal person. Nobody quite knows what they’re doing, so there’s a certain kind of struggle to cope.”
Ausiello: You know that Trinity killed Rita. I know that Trinity killed Rita. And Dexter knows that Trinity killed Rita. The police and the FBI, however, don’t know that Trinity killed Rita. And who’s almost always ID’d as the prime suspect in a murder case? That’s right, the spouse. Long story short: Dexter’s nightmare has only just begun.
Read more at EW