With sister Kendall making a big splash in the modeling world — and putting her sexy side on display — little sis Kylie Jenner is now playing catch-up, and jokingly goofing around on mom Kris Jenner's stripper pole won't cut it anymore.

"[Kris] is constantly saying how beautiful Kendall is — and doesn't say the same thing about Kylie," a source tells 'Life & Style.'

"Kris has always encouraged plastic surgery and has told Kylie how procedures like fillers and lip plumpers can make a huge difference."

kylie jenner

The teen has taken note and is following in her sisters' footsteps — even when it means dressing much older than 17.

"Kylie is absolutely acting out," says another insider. "She tries to get attention by dressing provocatively. It's textbook."

Just yesterday, the reality star posted a revealing photo of her ample chest, causing many to speculate whether she had a boob job.

kris jenner

The picture that sparked boob job rumors.

Kylie, however, denies going under the knife. "I’m not against surgery. I’d never say no, but I don’t desire it right now," she recently told 'Cosmo'.

Read more about Kylie's grown-up antics in the new issue of 'Life & Style,' on newsstands now.