Note 2 at Mt. 1:19: Joseph is called Mary's husband although they had not consummated the marriage yet (v. 18--"before they came together"). This is because the Jews considered the betrothal or engagement as being an act of marriage. This is the reason Joseph was planning on divorcing Mary ("put her away"---Mal. 2:15-16). According to the law of Moses, Joseph should have stoned Mary (Dt. 22:23-24); but instead, he was planning on divorcing her privately.