Kylie Jenner is competing with Kim Kardashian as she wants “a better body” than her older half-sister, a source told Hollywood Life. The news about the 17-year-old’s growing concerns about her body comes after she slammed rumors about breast implants.

“Kylie feels a tremendous amount of pressure to compete with Kim. No one wants her to try and live up to Kim’s fame and beauty, but Kylie can’t help but compare herself to her sexy older sister,” the source told Hollywood Life. “She sees herself in Kim and wants to be like her. But it’s really tough on her mentally because Kim is so beautiful and sexy. Her body is crazy sexy and Kylie gets frustrated trying to emulate her.”

The insider reportedly said that rapper Tyga’s girlfriend, who had previously said that her style is inspired by Kim, has been making efforts to “one up” her sister.

“Kylie uses make up, finds the sexiest dresses and outfits, and has her stylists giving her every beauty secret they can to help her outdo Kim,” the source reportedly said. “She really wants to one up Kim. She wants a better body than Kim.”

Last week, Jenner dismissed rumors of getting breast implants after fans commented that her cleavage at the Sugar Factory in Miami on Friday was unnatural. The teen star of “Keeping Up With the Kardashians” later addressed the rumors by posting a Snapchat video where she revealed that she had used duct tape to enhance her cleavage.

“To whoever thinks I have breast implants, there’s a whole lot of tape in here to hold these up,” Kylie says, in the video.

Last month, Kim scolded Kylie for “bragging” about her body after the latter had said that she hadn’t exercised for years.

“Kim told her that she used to be like Kylie, never working out and eating junk food but those days are over. Kim wants Kylie to know it takes hard work, exercise, diet and willpower to look as good as she does. Especially in her 30s after having a baby,” a source had told Hollywood Life.

In an interview with U.K.'s InStyle magazine, the teen reality star said that she had not worked out in two-and-half years, and had been eating whatever she wants.