Rob Kardashian FaceTimes Blac Chyna's Butt, Shares NSFW Photo

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That certainly gives new meaning to a “booty call”! Rob Kardashian and Blac Chyna spend plenty of time together these days, but when the newly-engaged couple can’t be in the same place they appear to make up for it by using FaceTime.

On Tuesday, Kardashian posted a screengrab from his FaceTime call that doesn’t exactly feature his fiancée’s face, but instead, the underside of her booty. In the NSFW pic, Chyna’s wearing printed leggings with her legs spread open and her butt on full display.

MORE: Rob Kardashian Rejoins 'Keeping Up With the Kardashians'

“BootyTime,” Kardashian captioned the photo.

Chyna spent the same day with her son, King Cairo, who was smitten with his new fireman suit and toy firetruck.

MORE: Rob Kardashian Speaks Out on His Engagement

“My Firefighter King Cairo,” Chyna captioned a sweet pic of her and Tyga’s son.

The once-reclusive sole male Kardashian heir has come out of his shell in recent months, returning to social media, stepping out more, and rejoining his family’s reality series, Keeping Up With the Kardashians.

The famous family has yet officially speak out about Rob’s engagement, though he previously told paparazzi that they are “very happy” when asked how they feel about the engagement.