Divorce advice needed. Wife cheated.

(edit) (Thread closed) Found a solution. Will ask her for a mutual divorce. If she disagrees then will name and shame her in front of her family. She will agree (hopefully)

Hi, I just found out that my wife cheated on me with my friend. I saw messages on Instagram where words like "I loved kissing your neck", "I miss your touch". I confronted her and she accepted (sort of, not explicitly). I have screenshots of the conversation. I would like to file for a divorce. Will I be required to pay an alimony? I know the laws of our country favour the wife. Are the screenshots enough? What if she files a fake case against me? I am distraught and clueless. Please help. 🙏