The 18-year-old model thinks she can outdo Kardashian, 33, and hence stripped down for her own risky photoshoot with Victoria's Secret photographer Russell James in a bid to show people she is a much better model, reported Contactmusic.
"Kendall finds Kim taking her clothes off really embarrassing and decided to prove that she could outdo her big sister. She's told Kim she doesn't want to be publicly associated with the Kardashian circus and its trashy reputation anymore," an insider said.