Child support

If my ex husband’s fiancé is now pregnant and about to have a baby will that effect the child support he pays to me? Will they lower my child support now that he has another family? Does it matter that my kids are older? (We have 3 my Youngest is 8) I live in Georgia. I don’t work and I’m remarried. & He gets the kids every other weekend. He currently pays 1,250 a month and claims they take 60% of his pay check already. So he says he’s going to have to get it reevaluated, because he already can’t afford his bills much less another baby. I just feel like that’s not my problem. 🤷🏼‍♀️