Saul is to blame for the messy relationship. He had given Michal to Paltiel and had organized that they would be married (1 Samuel 25:44). It was not proper for Michal to be married to someone else while she was married to David; her relationship was thus adulterous and so the stipulations in Deuteronomy 24:1–4 do not apply.1 Indeed, Ish-bosheth’s agreement to David’s demands shows that they were legitimate.2
15 And Ish-bosheth sent and took her from her husband Paltiel the son of Laish.