And when the wife of Uriah heard that Uriah her husband was dead,.... The news of which were soon sent her by David, though it is very probable she knew nothing of the plot to take away his life; and, besides, David chose to have his death published abroad as soon as possible, the more to hide his sin:
she mourned for her husband; expressed tokens of mourning by shedding tears, putting on a mourning habit, seeing no company, and this continued for the space of seven days, it may be, 1 Samuel 31:13; as little time as possible was spent in this way, and the marriage hastened, that the adultery might not be discovered.
Keil & Delitzsch on 2 Samuel 11:2–end
David's Adultery. - David's deep fall forms a turning-point not only in the inner life of the great king, but also in the history of his reign. Hitherto David had kept free from the grosser sins, and had only exhibited such infirmities and failings as simulation, prevarication, etc., which clung to all the saints of the Old Covenant, and were hardly regarded as sins in the existing stage of religious culture at that time, although God never left them unpunished, but invariably visited them upon His servants with humiliations and chastisements of various kinds. Among the unacknowledged sins which God tolerated because of the hardness of Israel's heart was polygamy, which encouraged licentious…
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