However, one person not happy with the fact that everyone knew about it before she had a chance to announce it, and that one person is Zoe herself!
[Image via WENN.]
Smile, you're on candid camera!!
We're not sure what Kris Jenner thinks of the (above) snaps, but we totally see Kendall drinking champagne out of a flute, and Kylie, 16, sipping on something in a wine glass.
The 18-year-old model and her sis are obviously mature for their age, especially since growing up in the spotlight…
But do you think they'd break the law so publicly??
Were Kendall & Kylie Drinking At Khloe's Yacht Birthday Party???
Total Votes: 3,815
But hey, maybe it's water, right?
[Image via Splash News.]