Reality television star Kylie Jenner posted a photo of an expensive Rolex watch on Snapchat on Friday, triggering speculation that her boyfriend Tyga may have given it to her as graduation present, Hollywood Life reported. Kylie’s graduation was followed by a party attended by Tyga, her sisters Kendall Jenner, Kim Kardashian and Khloe Kardashian, who was joined by her new boyfriend James Harden.

In the photo posted by Kylie, a silver Cartier bracelet can also be seen on her wrist, which she captioned as “It never ends!” and “Happy graduation to me,” the Inquisitr reported. She also posted a photo on Instagram showing her school diploma, and dedicated her success to her mother Kris, saying: “Thank you for making this experience as normal as possible for me.” Kris threw a party at the Kardashian-Jenner home in Calabasas, California, after Kylie’s graduation, Daily Mail reported.

On Tuesday, Kylie tweeted: “I finished school last week.. & I know I never post on social media when I'm in class but that doesn't mean... I don't encourage education! Because I do! gooooodnight.”

Kylie, who will turn 18 on Aug. 10, is looking to marry Tyga after her birthday. The engagement rumors started after the two were spotted together at a jewelry story in Beverly Hills in May. According to reports, Tyga took permission to marry Kylie from her father Caitlyn Jenner, formerly known as Bruce Jenner, which had infuriated Kris.

Meanwhile, Tyga is shrouded in controversy amid reports that he cheated on Kylie with transgender model Mia Isabella. The rumors began after a picture of his private parts, allegedly sent as a message to Isabella, was leaked. The 25-year-old rapper also has a son named King Cairo with model Blac Chyna, who has been taking digs at Kylie on social media.