Kim Kardashian went to the Epione skincare salon in Beverly Hills on Thursday, and she showed off her sexy curves (and her skintight braids) when she left following a beauty treatment.

While Kim hasn't had much to say about hubby Kanye West's Twitter meltdowns over the last week, she's pretty annoyed about it -- but she is still sticking by his side, according to a source for People.

"They're incredibly supportive of one another, not only publicly, but privately as well," the insider told the mag. "Kim has a unique understanding of him, probably in a deeper way than anybody else in the world. She's understanding of the way that he operates." But...

"What causes friction in the marriage, however, is Kanye's compulsive tweeting," the source added. "Kim can't stand it. She is all for self-promotion, but doesn't approve of Twitter drama."