But any bad blood seems to be behind the pair, with the Chun-Li singer extending quite an expensive olive branch to the new mother on Wednesday - and perhaps even putting her hand up as Godmother.
According to The Blast, the 35-year-old has gifted the Bodak Yellow hitmaker a $5000 baby basket from exclusive Los Angeles baby boutique Petit Trésor.
'The basket was bought minutes after the birth announcement was made,' reported the publication according to a source.
'The requirements for the basket were to "make it as girly as possible", and was stuffed with some of the store's most sought-after products including luxury seasonal clothes, an assortment of dolls and stuffed animals and, of course, a sterling silver rattle'.
They added that there were also luxury organic pampering items for Cardi as well.
It's a girl! 'The requirements for the basket were to "make it as girly as possible", and was stuffed with some of the store's most sought-after products including luxury seasonal clothes, an assortment of dolls and stuffed animals and, of course, a sterling silver rattle'
According to the insider, Nicki's basket has already been shipped express post to her fellow rapper's Atlanta home, and should arrive by end of day Wednesday.
Nicki's kind gesture comes after Cardi announced on Wednesday morning that she had given birth to her daughter, naming her Kulture Kiari Cephus.
Her husband Offset's real name is Kiari Kendrall Cephus.
Tuesday night saw her take to Instagram Stories where she wrote, 'Set it off then,' which seemed to be a hint that she was either going into labor or had just had the baby.
Cardi B revealed during an episode of Saturday Night Live in April she was expecting her first child with Offset, 26, after months of speculation she was with child.
And this summer news leaked that she wed Offset in secret in September at home just hours after he proposed.
Kulture is Offset's fourth child and second daughter - he is also the father to sons Jordan, eight, Kody, three, and daughter Kalea Marie, three - from three different relationships.