WhenYoungercreator Darren Star promisedmore OMG moments in season 2, boy, he wasnt kidding!

On the revelation that Thad has a twin brother named Chad …

SUTTON FOSTER:Its great for us.

We love Dan [Amboyer] so much, so when Thad died we were like, Ahhhhh!

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Credit: TVLand

And they were like, Were just going to introduce him as if everyone knows except for you.

Were not going to make a big deal out of it.

It cracked us up.

Its actually such a funny sort of weird-ass twist to the whole thing.

On whether Liza needs to worry about Chad figuring our her secret …

FOSTER:I dont know!

I have no idea.

I hope that there is a world where the show has sort of grown beyond her secret.

In many ways its really become about these multi-generational relationships and sort of how people connect despite age.

I hope theres a time where the show can exist without this big secret looming.

When youre grieving you make some weird decisions sometimes.

So that could be a funny thing to explore.

Im sure theyre going to bring someone new in for Kelsey to have a romantic relationship with.

And I think that Chad is going to be more of a problem for Liza.

Thats whats so great about this show: Theyve presented two totally viable, fabulous options.

They both have things to offer, and they both have pluses and minuses.

Im curious to see how it plays out.

DUFF:Its really tough for me because I love them both so much as people.

I hope thats in the cards …

The only thing I would hope for in this next season is that she tells Kelsey.

Kelsey is sometimes a bit unpredictable, but I think shell be totally crushed and angry.

Because shes a very loyal person.