Rob Kardashian sent a voice note to his pregnant sister Kim Kardashian as a cure for her morning sickness, according to the 28-year-old reality TV star's Twitter account. The exchange of tweets between the two siblings Monday came just three months after he had slammed Kim on Instagram.

Rob, who has been battling to control his weight, wanted to help Kim after she wrote on her Twitter account that she was suffering from nausea. In reponse to Kim's tweet, Rob posted the lyrics from French Montana's song “Hard Work.”

Kim, who is married to rapper Kanye West and has a daughter North West, has reportedly forgiven Rob for his harsh comments on Instagram in March.

Rob had posted a bloody picture of “Gone Girl” character Amy Dunne and compared her to his sister Kim. Several reports later said that Rob believed Kim is a “puppet master” who controls his family.

Rob's reportedly had a strained relationship with Kim since dropping out of attending her wedding to Kanye because of his physical appearance.