Well, this is QUITE the accusation.
She shared a clip of the part the hitmaker stole, and called her out in the caption, writing:
[Image via Beyoncé/Marlyn Ortiz/Instagram.]
She and her beau Simon Konecki reportedly welcomed their new son into this world on Friday and even though, her rep isn't commenting on the precious new arrival, we hear that the two are "ecstatic."
As are we! We srsly can't wait to meet that new little bundle of joy!
[Image via WENN.]