When January Jones announced that she was pregnant with her first child, I figured they would just make her character pregnant as well, especially since she is remarried. Her character wasn't on the first episode, but last night January Jones returned to Mad Men looking a little heavier and rounder - and the subject of a dramatic storyline.
Fans of the show knew she was pregnant so were expecting to see a change in her appearance as she looked much rounder in the face than usual.
But what they probably weren't expecting was the shocking storyline that writers are using to cover her pregnancy - which they are passing off as a tumor.
Betty, played by Jones, returned to the drama last night having been absent from the previous two episodes. Although they managed to conceal her bump with clever camera angles that didn't go any lower than her chest, the episode, which was directed by Jon Hamm who plays her ex-husband Don Draper, focused on her significant weight gain.
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Thinking she was getting fat, Betty goes to the doctor to see if he will prescribe her some weight-loss pills.
But the doctor reveals that she has a tumour in her thyroid, which explains the weight gain, but also leaves Betty in fear for her life.
The typically-cold and hard Betty crumbles and calls Don to discuss her fears about dying and leaving their three children without a mother.
But as soon as the tumour turns out to be benign, Betty is back to her hard, sharp-tongued self again.
And he response to finding out she didn't have cancer? 'It's nice to be put through the ringer and find out I'm just fat.'
January didn't gain much weight while she was pregnant so bosses had to resort to make-up tricks - the same ones they used on on Elisabeth Moss during Peggy's pregnancy late in season one.
Relief: Betty kisses her second husband Henry