In addition to collecting alimony, my husband's ex-wife often sends him text messages asking for money every month, and my husband gives it behind my back. Can this money be used as an advance payment

In addition to collecting alimony, my husband's ex-wife often sends him text messages asking for money every month, and my husband gives it behind my back. Can this money be used as an advance payment for child support? The best way is for three people to sit down and make it clear, whether it's unfair to you that your husband and his ex-wife solve it alone, or it's not good for you that you and her ex-wife solve the distrust of your husband alone. It's only good for you to make things clear face to face, otherwise it's hard to ease it.