Ready to be a family-of-three?!

It looks like rapper Tyga, 26, is ready to settle down with his girlfriend Kylie Jenner, 19. And we're not talking about an engagement.

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According to a source close to the lip kit queen, she's been spending a lot of time with Tyga's four-year-old son King Cairo — so much so, that she's come down with a case of baby fever.

"Kylie and King have a special connection and it’s really making her think of having a kid with Tyga. Tyga‘s down," the source said. "He told her one of his greatest joys is being King’s father and that he’s down to father a child with Kylie."

In fact, ever since Tyga's ex, Blac Chyna, gave birth to her daughter with Rob Kardashian, Kylie has been mulling over the idea.

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"She told Tyga she could see herself being a mother," the source continued. "She explained to him she wants to have a child when she’s still young so she can have the energy and stamina to keep up with the kid, just like she’s keeping up with King!”

kylie jenner and king cairo
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Click through the gallery below to see Tyga and Kylie's cutest Instagram pictures together!