The singer revealed her son and Beyoncé's daughter are "extremely close"

Credit: David Livingston/Getty Images

Kelly Rowland isn’t ruling out having another baby —but jokes she has her hands full with just one.

The “Motivation” singer tells PEOPLE her 2-year-old son, Titan Jewell, is busy “tearing up” her house.

“One more is just fine!” she joked at Friday’s March of Dimes Celebration of Babies at the Beverly Wilshire Hotel in Los Angeles. “I feel like he’s a handful —drawing on my walls and cussing me out!”

Despite her son’s rambunctious undertakings, Rowland couldn’t be happier.

“He’s awesome and I’m so blessed to have him,” she says, adding that husband Tim Weatherspoon “is an excellent dad. We have a nice little unit, us three.”

Rowland, 35, shares that Titan has musical inclinations but that he seems more interested in sports and planes.

“He is a boy’s boy. But, if he hears myself or anybody singing, he’s going to repeat it,” she says. “I can’t wait ’till Jenny [Hudson] gets to the house so we can play, vocally, together. He’s a sports little guy, trains guy, planes guy.”

And much like Rowland and childhood pal (and one of Fortune‘s most powerful women) Beyoncé, Titan is tight with Blue Ivy, the latter’s 4-year-old daughter with Jay Z.

“They are extremely close. It’s the sweetest thing. It’s the greatest thing about friendship, when you’re able to grow up together and your children grow up together,” she explains. “They act like cousins.”