Brown reportedly thinks Jameel is not good enough for his ex-girlfriend with whom he shared a serious relationship for years.
"RIP cousin... can't believe it was just last night that I held you in my arms! never thought that would be the last time," she wrote on Instagram.
Rihanna completed her "girl boss" look with a pair of killer heels in the same vibrant red shade and some gold chains that adorned her neck.
The snaps show the Barbadian singer striking sultry poses and flaunting different shades of lipstick.
Brown, 28, left his followers less than impressed after posting the Instagram clip of the baby simian.
The singer is said to be dating Saudi billionaire Hassan Jameel since July 2017. The news is not confirmed yet.
The Love on the Brain hitmaker slammed the industry that uses not only transgender but also black women as a "tool" for endorsements.
Who is Cyntoia Brown? Kim Kardashian, Rihanna and more demand justice for imprisoned child sex slave
The 29-year-old Tennessee woman was sentenced to life in prison for the murder of man who hired her for sex when she was just 16.
Rihanna and Kim Kardashian among stars lobbying for jailed child sex trafficking victim Cyntoia Brown
Rihanna, Kim Kardashian and others have shared an image of a post partly describing the circumstances leading child sex trafficking victim Cyntoia Brown to be jailed in 2004.
Rihanna and the Saudi businessman are rumoured to be dating since July this year and they have even been spotted together on several occasions.
Rihanna looks typically glamorous in the November issue of the glossy magazine.
Drake is said to be worried about losing RiRi forever even though he "always tries to stay friends with his exes".
One of the photos shows RiRi smiling and flaunting her wrist tattoo on her right hand while posing for the camera.
RiRi is seen flaunting her figure in a low-cut floral dress.
She has shared the snap on Instagram.
Couple stepped out at Rihanna's Clara Lionel Foundation Diamond Ball in New York.
She is seen flaunting her cleavage as well as her knickers in photos she shared on Instagram.
She has shared the photo on Instagram.
Or perhaps he's just being supportive from the friend zone.
Pop star has spent past week in London spending time with her boyfriend Hassan Jameel.
Princess Diana touched the hands of HIV positive patients in public at the height of the epidemic, in the 1980s.
The Saudi billionaire was trying to shield his famous girlfriend away from the paparazzi.
Tran was trolled for flaunting her body in a barely-there bikini.
Chris Brown's ex Karrueche Tran mocked for flaunting sexy curves in skimpy bikini: 'Copying Rihanna'
The actress previously praised Rihanna's 'thick body'.
Singer has come under huge scrutiny for her weight gain in recent months.
Rihanna wore a barely-there bra and matching thong to complete her sultry Crop Over look.
Singer flew back to her home country of Barbados for annual carnival on Kadooment Day.
'Somebody called me too fat?' says RiRi.
In his documentary, Chris Brown: Welcome To My Life, the Ayo singer said he wanted to marry RiRi.
Songstress flaunted cleavage in a low-cut two-piece attire at Valerian premiere in Paris.