Are reality-TV star Rob Kardashian and urban model Blac Chyna engaged?

Chyna, born Angela Renee White, posted an Instagram image Tuesday of herself and Kardashian showing an engagement ring on her finger. “YES !...!...!” she captioned the photo. About two hours later, Kardashian, 29, part of E!’s “Keeping Up With the Kardashians” reality-show clan, placed on his own Instagram account a photo of Chyna with the same ring and holding a huge wad of cash, topped by a one-dollar bill.

Three sources close to Chyna confirmed the engagement to E! News Tuesday. But neither Chyna nor Kardashian have specifically confirmed an engagement, and neither has elaborated on their respective Twitter pages.

Model Amber Rose did tweet this morning, “Congratulations to my Family Blac Chyna and Rob Kardashian!!!”

GossipCop.com said Kardashian proposed Monday night in Los Angeles.

Kardashian — brother of Kim, Khloé and Kourtney Kardashian and half-brother of Kendall and Kylie Jenner — reportedly began dating Blac Chyna in January. On Jan. 25 she posted a black-and-white Instagram image of herself being held by an arm with tattoos resembling those of Kardashian. “The beginning,” she captioned the since-deleted photo.

The relationship caused social-media controversy since Blac Chyna’s former boyfriend, rapper Tyga, with whom she shares 3-year-old son King Cairo Stevenson, left her in 2014 for then 17-year-old Kylie Jenner.