The couple, who already have three-year-old daughter Blue Ivy together, are feeling incredibly "lucky" over their apparent impending arrival, reported Hollywood Life.
"They've been trying for a while, and it was so hard when it wasn't happening. They both desperately wanted another child and feel so lucky. But they definitely won't tell everyone with just a statement - that's not their vibe," a source said.
And the "Drunk In Love" hitmaker is also believed to be worried about "jinxing" things by revealing they are expecting ahead of the first trimester.