Less than a week after Kim Kardashian revealed her impressive post-baby weight on Snapchat, the 35-year-old's soon-to-be sister-in-law Blac Chyna followed suit, posting a photo of her scale on the social media platform.

While Kim has been documenting her weight loss journey, Chyna is gaining weight due to her recently announced pregnancy. "From 139lbs to 165.6lbs," the 28-year-old captioned the shot.

RELATED: Blac Chyna Shares the First Sonogram Pic of Her and Rob Kardashian's First Child!

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The mother-of-one, who's engaged to Kim's brother Rob, also joked about eating an unhealthy meal, telling fans, "Like no lie, my goal is to gain like 100lbs in this pregnancy. I'm gonna tear it up, then I'm gonna snap back."

Meanwhile Kim, who's been showing off her svelte figure a lot lately, is down to 131 pounds after gaining more than 50 while expecting son Saint.

For a closer look at Chyna and Rob's whirlwind romance, scroll through the gallery below!