United Kingdom, May 2 -- Sofia Vergara doesn't think it would be "fair" for her to have another baby.

The actress turns 52 in July, and Sofia - who split from Joe Manganiello last year - has revealed that she isn't interested in having another child.

The Hollywood star - who already has a 32-year-old son called Manolo with her first husband, Joe Gonzalez - told PEOPLE: "There's things in life that might sound like good ideas, but they're not.

"I was a mother already. I know what it means to be a good mother or to try to be the best mother that you can, and that takes a lot of sacrifices, takes a lot of energy."

The decision not to have another child actually influenced Sofia's split from Joe, 47.

Despite this, the actress respects an...