23 On that day, some Sadducees, who say that there is no resurrection [of the dead], came to Him and asked Him a question,

24 saying: "Master, Moses said: 'If a man dies without leaving children, his brother as a close relative will marry his widow and raise children for his brother'.

25 Now there were seven brothers among us; the first one married and died, and having no children left his wife with his brother.

26 The second also [died without children], and the third, until the seventh.

27 Finally, the woman died.

28 Then in the resurrection, whose wife will be the seven? Because everyone had married her. "

The Sadducees did not believe in the resurrection. And they cited the story of a woman who married a man who later died. According to the law of the levirate, cited in the book of Deuteronomy 25, her husband's brother married her to perpetuate the offspring of the dead brother. But he also died and the same thing happened to the other brothers. In this case, the Sadducees were wrong in two aspects that the Lord emphasized: read verses 29 and 30:

29 But Jesus answered them: "You are all wrong because you do not know the Scriptures [that teach the resurrection] or the power of God [because He can raise the dead].

30 Because in the resurrection, neither men marry nor women give themselves in marriage, but they are like angels in heaven [who do not marry nor produce children].

Here they demonstrated their ignorance in two areas; the Holy Scriptures and the power of God. It does not say here that those were angels. Neither we will be angels in heaven but angels, in the sense that in heaven we will not marry, because there it will not be necessary to continue the offspring through birth. This does not mean that a husband and his wife, who on earth were very close, can not remain united in heaven if they wish. In any case, both will have a new disposition and, surely, they will get there much better than when they were on earth!