"I am forced because Kim Kardashian told me [I've] got to rock it every day. If I walk out the door and don't look at least good and presentable they're gonna use that shot forever," the I Am Cait reality star said, referring to the paparazzi.
"You're not forced, this was a choice," Kim replied.
Since Kim is an expert when it comes to beauty and fashion, the 34-year-old reality star offered up an easy solution to Caitlyn.
"How about we do a tutorial of me doing your makeup and you doing my makeup, and I'll have someone there to correct it," she says, noting that she'll get help from her glam squad. "Ha! Caitlyn with a Kim Kardashian makeover!"
This isn't the first time Kim -- who is pregnant with her second child with husband Kanye West -- has gushed about Caitlyn's looks. ET caught up with her in June at the Council of Fashion Designers of America Awards in New York City, where she opened up about her stepfather's transition from Bruce to Caitlyn.
"[Caitlyn]'s beautiful," Kim told ET. "I'm so proud that she can just be her authentic self. I guess that's what life is about."
Kim may have the upper hand in the beauty department, but there's one thing Caitlyn has that she's envious of -- "the best" breasts.
On Sunday's Keeping Up With the Kardashians, Kim tells her sister, Khloe, about recently helping Caitlyn change outfits.
"I went into the closet, and she went to change, and she was like, 'You can stay in,' and took off her top and had no bra," Kim reveals. "Her boobs were like Kourtney's like when she first got hers done. Like, it made me want a boob job. Like, the best boobs."
Watch the video below to see Khloe's cute reaction to Kim's rack revelation.