The 35-year-old singer talked to E! News and other outlets Friday at the sixth annual March of Dimes Celebration of Babies charity luncheon in Beverly Hills about her future family plans. Rowland has a 2-year-old son, Titan, with husband Tim Witherspoon.
"Well, one more is just fine!" she said, regarding children.
"I feel like [Titan is] a handful tearing up my house and drawing on my walls and cussing me out, oh my goodness," Rowland added, laughing. "But he's awesome and I'm so blessed to have him and his dad is an excellent dad. We have a nice little unit as three...we'll see what happens."
"He is a boy's boy but if he hears myself or anybody singing he's going to repeat it," she said. "It's the weirdest thing, melody for melody."
Rowland said the couples' kids "act like cousins."
"Yes, they are extremely close," she said. "It's the sweetest thing. It's the greatest thing about friendship when you're able to grow up together and your children are able to grow up together and it's just years. Just years upon years of beautiful friendship and sisterhood."