Sin City: A Dame To Kill For actress Jessica Alba may look ultra sexy in the movies, but she recently told OK! magazine that she’s actually a “real prude.”

“The key word is play—everyone who knows me well knows that I’m a real prude!” she told the magazine. “But a good director can make a scene look sexy without me taking off my top. That’s why I love working with Robert [Rodriguez] on these movies.”

Alba, a mother of two, believes that finding a work-life balance, especially as a mom, is important.

”I’m very lucky I have a lot of help,” Alba said. “As women, we have to accept that we can’t do it all. It’s important to show our daughters that there’s more to each of us than just being a mother.”

Sin City: A Dame To Kill For, directed by Rodriguez and Frank Miller, features a handful of other big-name stars, including Mickey Rourke, Josh Brolin and Eva Green.

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