What is the way to get rid of obsessive thoughts about the wife's past, especially her relationships with her former husbands, knowing that she is a woman of religiosity and good character?

Remember that your Prophet Muhammad, peace and blessings be upon him, married divorced women and widows. And female companions like Zaynab bint Jahsh and Asma bint Umays married more than once without being criticized. Do not let doubt and anxiety destroy your marital life, for your wife is righteous and her past is clean. You should be a support for her, not punish her for a permissible past. Remember that divorce is the most detestable of permissible acts to Allah, and Satan rejoices in it. If you divorce your righteous wife now, it might harm both of you. Thank Allah for the blessing of this beautiful, religious wife, and remember that few of Allah's servants are grateful.