Though Rob Kardashian and younger sister Kylie Jenner may not agree on everything – such as his relationship with fiancée Blac Chyna – that hasn't stopped them from hanging out or celebrating one another.
On Saturday, Kardashian, 29, congratulated Jenner, 18, on her new Paper magazine cover (reposting an earlier image of Jenner celebrating with the magazine at the Coachella music festival).
"Congrats Sis," he wrote with the Instagram photo, adding a big blue heart.
And though Kardashian's engagement to Chyna – who has a young son from a previous relationship with Jenner's boyfriend, Tyga – stirred up strong feelings from his family, that hasn't kept them apart.
Kardashian and Jenner were pictured together last month, and Jenner went out of her way then to clarify that she sees her brother "all the time."
One source told PEOPLE in March, however, that Jenner feels less positively about Chyna: "Khloé [Kardashian] and Kylie think Chyna is desperate, thirsty and playing with Rob's head. They're also concerned she is after his money and that she is dying to stay relevant and get back at Kylie by being with Rob."
"As far as they're concerned," the source told PEOPLE in March, of Kardashian's sisters, "Blac Chyna will never be a Kardashian."