Twelve days after giving birth to her baby girl North West and 13 days since she last tweeted to her 18 million-plus followers, Kim Kardashian broke her Twitter silence to wish her sister Khloe a happy birthday.

Kim's younger sister Khloe turned 29 today and this afternoon, the new mother took to Twitter to post Instagram photos of her beloved sibling -- then and now.

First Kim tweeted:

kim khloe

Followed by --

kim khloe

We must admit, we wish Kim would have tweeted photos of her highly anticipated newborn ... But this is just as sweet. Nothing like sisterly love, Kim!

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