This is for the OP, i would be cautious with cursing your sons father, there could be some unforeseen consequences for cursing somone so close especially for your son. In general i wouldn't say you need a deity to do a curse for you, utilizing your own energy or the ether would suffice, for example, candel magic, sidgual, bind runes, staves, or plain out use your words and emotions, why do you think we say things like dont point, watch your words, or "curseing" somone out, we even "spell" words. You see what i am saying?