When the mourning was past; which was seven days, Genesis 1:10 1 Samuel 31:13. Nor could the nature of the thing admit of longer delay lest the too early birth of the child might discover David's sin. David sent and fetched her to his house, and she became his wife; by which it appears that David continued in the state of impenitency for divers months together, and this notwithstanding his frequent attendance upon God's ordinances; which is an eminent instance of the corruption of man's nature, which is even in the best; and, without Divine assistance, is too strong for them; of the deceitfulness of sin, and of the tremendous judgment of God in punishing one sin, by delivering a man up to another. The thing that David had done, i.e. his adultery and murder, as is evident from the next chapter.
Related Commentaries of 2 Samuel 11:27
2 Samuel 11:27
27 And when the mourning was past, David sent and fetched her to his house, and she became his wife, and bare him a son. But the thing that David had done displeasedf the LORD.