If the jaw-dropping season finale of Big Little Lies left you wanting more, you’re not alone. The show’s star and executive producer Reese Witherspoon, who plays town gossip Madeline Mackenzie, is pushing for a second season, even though it was intended to be a one-and-done miniseries. “Reese has already spoken to the show’s creator, David E. Kelley, about it,” says an insider. The HBO series was a hit, pulling in nearly 2 million viewers for the April 2 finale, but Reese, 41, has another reason for wanting the show to go on: “She had so much fun on the set with her co-stars Nicole Kidman, Zoë Kravitz, Laura Dern and Shailene Woodley,” the insider says. “Plus, she loves that they film in Malibu, near her home, so she can go…