Did Kris Jenner allow her teen daughter to undergo lip augmentation? Reuters

Kylie Jenner surprised fans of “Keeping Up With the Kardashians” on Wednesday when she announced she had been getting lip injections since 2014, something she'd denied for months. Now, many of the 17-year-old’s critics are pointing at Jenner’s mother, Kris, who likely allowed her daughter to go through with the procedure.

Any person who is not yet 18 needs parental consent to have any type of procedure done, according to the American Society of Plastic Surgeons. “As with any surgery, parental consent is required for all plastic surgery procedures performed on teens younger than 18 years old,” the organization’s website says.

The site also says that the teen should have “realistic goals” and “sufficient maturity.” “Plastic surgery is not recommended for teens who are prone to mood swings or erratic behavior, who are abusing drugs and/or alcohol, or who are being treated for clinical depression or other mental illness,” the organization added.

The Jenner family hasn’t responded to Kylie’s statement, but mother Kris has openly admitted to her love of plastic surgery. The 59-year-old has discussed her breast augmentation and use of injectables like Botox. Does that mean she signed off on Kylie’s use of fillers? The family isn’t saying, though more will probably be revealed on their E! reality show on Sunday.

"I have temporary lip fillers, it's just an insecurity of mine, and it's what I wanted to do. I want to admit to the lips but people are so quick to judge me on everything, so I might have tiptoed around the truth, but I never lied,” Kylie said in a preview of the episode.

She also defended her different look in an interview with Cosmopolitan magazine in January.

"You guys have watched me grow up since I was 9,” she told the beauty magazine. “My face is going to get different. Now, I know how to do my makeup, contour and everything. I'm not against surgery. I'd never say no, but I don't desire it right now."

The Kylie Jenner lip challenge went viral on Twitter in April, a trend where young women and men attempted to mimic the famous teen’s plump pout by sucking on a glass or plastic cup. Many participants ended up with swollen faces and bruises.

"I'm not here to try & encourage people/young girls to look like me or to think this is the way they should look. I want to encourage people/young girls like me to be YOURSELF & not be afraid to experiment w your look,” Jenner said when she learned of the challenge.