Blac Chyna had someone coaching her through her nude photoshoot for Paper magazine: Kim Kardashian. The pregnant model and reality star posed in her birthday suit for the publication’s latest issue, and a new report claims Kardashian was by her side to pass along a few tips.

Paper magazine’s managing editor Abby Schreiber told E! Online Monday that Kardashian stopped by the Los Angeles set while they were shooting Chyna to show her support for Rob Kardashian’s fiancée. “Kim actually came by the shoot, which was really nice to see her giving encouragement to Chyna and talking to her,” she said. “Kim came on set that day in L.A. and hung out for a little while. They were chatting.”

Schreiber said she had gave Chyna some copies of Kardashian’s nude Paper magazine cover, Break the Internet, but didn’t know the “Keeping Up With the Kardashians” would actually pop up at the shoot. “It’s kind of funny that Kim actually turned up and low and behold her magazine was on the table,” she said.

Schreiber said she doesn’t know exactly what Kardashian and Chyna talked about, but said it seemed like the mom of two was there to “give her support and encouragement and advice.” As for what was the inspiration behind Chyna’s naked cover, Schreiber told E! that they didn’t want it to be “in your face sexy” since Chyna is pregnant but definitely wanted her to pose for the cover without her clothes. Schreiber also said they didn’t want Chyna’s shoot to resemble Kardashian’s. “ We brainstormed with [photographer Charlotte Rutherford] some ideas and she put together a mood board that kind of highlights Chyna's pregnancy and kind of had a style in very sort of feminine, elegant way that definitely incorporated nudity and was sexy but was done in a very sort of elegant, classic way ,” she explained.

While Chyna looks stunning on the cover of Paper, she has been very open with fans about her fluctuating weight ever since getting pregnant. In a recent Snapchar video Chyna told fans that she recently lost six pounds after her weight went “from 135 to 183 to 176.2.” Chyna said she dropped the weight by working out twice a day, “eating more clean and walking.”

Chyna and Kardashian announced they were expecting in May, just one month after revealing they were engaged. The pair’s baby is due in the fall.