Who is Allah and why did he back Muhammad Adultery up?

Is Quran not a devil book written to cause confusion because of Bible for Muhammad to be allowed to walk with Jinn(Satan) & Malaika(angel) (https://waxfem.blogspot.com/2026/01/the-believe-of-muslims-about-working.html?m=1) and likewise for Allah to back up his lapses including adultery with revelation of his word?

The Incident According to the traditions (hadith and tafsir), Muhammad had sexual relations with Maria—who was gifted to him and held as a concubine (milk al-yamin)—in the house of his wife Hafsa on a day designated for her. Hafsa returned, found them together, and was deeply distressed that this occurred in her home and on her bed. The Oath and Revelation To appease Hafsa and make amends, Muhammad swore an oath to her that he would no longer sleep with Maria. Following this oath, Surah 66:1-3 was revealed: "O Prophet! Why do you prohibit [yourself from] what Allah has made lawful for you, seeking the approval of your wives? And Allah is Forgiving and Merciful." (Quran 66:1)