Addison says her goodbyes to Seattle, and heads back home to tangle with her brother, her best friend's hopeless crush on him, and also deliver a hermaphroditic newborn. Quite an episode!

After a dramatic episode of Grey's Anatomy, we find ourselves back in L.A., where Archer is still sleeping with anything that moves, behind Naomi's back.

Addison tells him she can't keep his secret, no matter what the Montgomery Party Line is. But she does, at least at first.

She finally breaks down and tells Naomi the truth, but Archer has skipped town.

Charlotte asks Cooper to move in with her, but he refuses.

She ends up getting past the situation by sleeping with Archer, beating herself up about it, and telling Cooper, who refuses to let that ruin things, even if he's the guy living with Violet.

Charlotte's tough as nails exterior is crumbling.

Violet agrees to co-chair a couples' therapy session with Sheldon. Violet ends up seeing a wife and a husband - of different couples - making out in the stairwell.

Sheldon and Violet end up approaching them both, and even though they decide to face their respective spouses and be together at first, the husband ends up reconnecting with his own wife, and the girlfriend finds out during the next session.

Her husband leaves the session, saying he's done, but the other remaining couples reconnect. And in the end, so do Violet and Sheldon, finding some kind of middle ground.

And Pete is broken, he says, but his cancer patient who's living in denial is a little more so. And Sam, who called his girlfriend "Naomi" is a little farther down the denial road.

The secondary story line involved a newborn with both sets of genitalia. The parents aren't sure whether to assign a gender now, or wait, and face peer and social issues.

They decide to go along with the original ultrasound, and assign the baby as male - even if genetically, the child has two big X chromosomes and Addison stresses that only 30 percent of children orient as male.

In the end, she tells the parents that she can't do the surgery, and the mother agrees, against the wishes of the dad.

The dad walks out, but Naomi, fresh off the pain of Archer's cheating and departure, confronts him. He returns in the end.

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