A pap learned the hard way that Jennifer Lopez is not to be played with when it comes to her children.

The “Unstoppable” star and “Ain’t Your Mama” singer attended Sunday night’s black tie Broadway premiere of Othello with her 17-year-old date, her child Emme. A spy told Page Six Lopez was in full “mama bear” mode, when a pap accosted them exiting the Ethel Barrymore Theater.

A spy witnessed a “huge paparazzi camera” get in between her and Emme, and while the lens was shoved in the latter’s face.

“[Lopez] yelled at the guy. She went mama bear,” a source told Page Six.

Aside from the unruly photog, Lopez and Emme appeared to have a great evening. “Othello premiere with the best date ever,” she captioned a video clip of them shimmying the following day.

Lopez’s battle with the pap wasn’t the only drama that unfolded on Sunday night. TV host and comedian Sherri Shepherd revealed an “unnamed celebrity” tried to come for her at the opening on her show Monday morning.

She claimed the star grabbed her arm, “and then forcefully turned me around… and she says to me, ‘You’ve been shading me a lot.’”

“She came up to me in front of everybody… You don’t freakin’ get to do that to me,” Shepherd said.

A rep for Shepherd did not comment, but sources told Page Six the star Shepherd was referring to was actress, Nia Long, who also did not immediately comment.

The star-studded opening brought out celebs like Martha Stewart, Samuel L. Jackson, Tamron Hall, Jamie Lee Curtis, Christina Baranski and former President and First Lady Joe Biden and Jill Biden, who received a standing ovation at the show. They later partied with the cast including Denzel Washington and Jake Gyllenhaaal at Tavern on the Green.