The phrase "went in to her" is a graphic description of David having sex with his wife. These two phrases have the same meaning and are used together to emphasize that they slept together. AT: "slept with her" (See: [[rc://en/ta/man/translate/figs-parallelism]])
# he sent word through Nathan the prophet
Here "word" refers to a message that Yahweh told Nathan to tell David. AT: "he sent Nathan to tell him" (See: [[rc://en/ta/man/translate/figs-metonymy]])