What part of Please show where scripture uses the words “mother of God” are you having trouble with?
Perhaps the second time it will become clear: I’m not certain I follow you here. Are you saying that Mary was never pregnant by God the Father and that Jesus wasn’t born the normal, natural human way from womb to cervix to vaginal canal, umbilical cord, placenta, etc.?
Are you requesting the phraseology ‘mother of God’ be exactly matched in the Bible? Are you denying Isaiah’s references to her or Jesus’ or both?