A source tells ET, that the cute couple are "so happy about her pregnancy."
"Rihanna has always wanted to be a mother and have children. She thinks A$AP is going to be the best dad," the source shares. "A$AP has been tending to all of Rihanna's needs and they are really enjoying this moment together as a couple."
The source says that the pair "were trying to keep the news private for a while, but they felt ready to share it now and are so excited."
"Rihanna and A$AP have such a strong bond and they can't wait to experience parenthood together," the source adds.
Another source told ET on Monday that the couple is feeling very blessed that they're having a baby together, and that they already considered themselves a family but having a baby together makes that bond even stronger.
"They enjoyed keeping the pregnancy a secret for as long as they could, but they're thrilled to be able to share the news with their fans," the source said.
Rihanna has made it no secret that she wants to be a mother. In March 2020, she told British Vogue that she wanted three or four kids by the time she was 42 -- with or without a partner.
"I feel like society makes me want to feel like, 'Oh, you got it wrong…' They diminish you as a mother if there's not a dad in your kids' lives," she told the magazine. "But the only thing that matters is happiness, that's the only healthy relationship between a parent and a child. That's the only thing that can raise a child truly, is love."