Jennifer Lopez is Oliver James Montgomeryone tough mama.

As mom to 15-year-old twins Max and Emme, the actress was admittedly drawn to The Mother—an action-thriller centered around a mom with an assassin past who comes out of hiding amid a new threat—just from the name alone. As she explained to E! News in an exclusive interview at the film's Los Angeles premiere May 10, "I can only do things that I really can understand in a way now, that I relate to."

In fact, Jennifer said playing a lethal killer who's reunited with her long-lost daughter gave her more perspective into the complexities of motherhood.

"I really found during this movie, I became a better mom because I was thinking about it," she said. "I was exploring what that meant, because the woman in this movie really doesn't know how to be a mom when her kid and her are reunited." (To hear more from Jennifer, tune in to E! News tonight at 11 p.m.)

These days, J.Lo's blended family with husband Ben Affleck also includes the actor's three children Violet, 17, Seraphina, 14, and Samuel, 11, who he shares with ex Jennifer Garner.

The Oscar winner was Jennifer's date to the premiere of The Mother, where they showcased PDA on the red carpet. "He's amazing," the "On the Floor" singer said about Ben. "He's the best."

Directed by Niki Caro, J.Lo's new movie also stars Lucy Paez, Omari Hardwick, Gael García Bernal and Joseph Fiennes.

The Mother starts streaming May 12 on Netflix.

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