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It wasn't all work and no play for actress-turned-reality TV star Denise Richards this week as she took a scuba diving lesson in Malibu. Thirty-eight-year-old Denise also managed to squeeze in some fun pool time with her daughters Sam, five, and four-year-old Lola Rose - her children with former husband, actor Charlie Sheen. The two youngsters – who were clearly thrilled to join their mum in the water - can occasionally be seen in the beauty's fly-on-the-wall TV show Denise Richards: It's Complicated.Including them in the reality series has brought her in for flack from some commentators, but Denise has recently spoken out to defend her decision. "They’re on for a minute here and there,” she says. "The show isn’t about them. "I get to incorporate them into the show – which means I can take them to school as a part of my job. How many single working moms can say that?" She continues: “Everyone is so judgmental… the bottom line is, I'm not exploiting my children. "