One of reality television’s most compelling ongoing story lines has a conclusion: Kim Kardashian is pregnant with her and Kanye West’s second child.

Seriously, if you watch E!’s “Keeping Up With the Kardashians,” you know Kim’s struggle to get pregnant again has been a big plot point. Strangely, the news was revealed not during Sunday’s mid-season finale, but in the network’s brief teaser promo for the rest of the season. It was possibly the most Kardashian thing that has ever happened.

“I just got the blood test back and I am pregnant,” Kim beams to her sister Khloe in the footage.

“Woooo!” Khloe responds.

It has been quite a journey: In the season premiere, the show alluded to Kim and Kanye having sex everywhere, all the time, as they tried for another baby. (Their toddler daughter, North West, will turn 2 in a couple weeks.) Kim and Kanye even apparently sneaked into a bathroom during a photo shoot — Kim discussed it on camera afterward.

The E! show followed Kim to a fertility doctor multiple times, including on Sunday night. As her doctor explained some of the medical procedures in more detail, she sighed that she was “so over it.”

“I’m exhausted,” she said. “I’m sure everyone gets to that point. I’m like, ‘Okay, I’m done.’ ”

The tabloids have extensively chronicled Kim’s ongoing fertility issues, which may have tipped off some careful readers — that, along with this mysterious tweet from Kim on Sunday afternoon before the episode.

We’ve said it before and we’ll say it again: Nobody does publicity like the Kardashians.

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