06/13/2012 01:43 am ET Updated Jun 13, 2012

'Giuliana & Bill': Giuliana Doesn't Know Who Wrote 'Huckleberry Finn' (VIDEO)

What could prompt Bill Rancic to declare that he's going to have to go for full custody of his child? On "Giuliana & Bill" (Tue., 8 p.m. ET on Style), the couple looked back at past episodes, offering marital advice to viewers, as well as just being their charming selves.

It's the sweetness of their relationship that makes the show such a feel-good experience for viewers. The couple knows how to laugh and have a good time, and they've kept their spirits high through some challenging steps along the way already.

But one challenge got Bill reconsidering who should be raising their children. When he randomly asked her who wrote "Huckleberry Finn," Giuliana declared uncertainly that it was Tom Wayne. Then, with more authority, she shouted, "Thomas Wayne!"

She knows who the father of millionaire -- and late night caped crusader -- Bruce Wayne is, but that wasn't quite right. She did correctly name Mark Twain a few moments later, but the damage was done.

"I still want full custody," Bill laughed.

With the ratings still on the rise, the couple is certain to return to the Style Network for a sixth season.

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