Is it permissible for a man who committed a lewd act with his fiancée's mother to marry his fiancée?

The jurists differed regarding the marriage of a fornicator to the daughter of the woman with whom he committed fornication. The Hanafis and Hanbalis held that it is impermissible, while the Malikis and Shafi'is held that it is permissible, which is the stronger opinion. Nevertheless, this marriage is not recommended to avoid jurisprudential disagreement and for fear of renewed discord due to the fornicator's proximity to the girl's mother. Your friend must sever her relationship with this man due to his bad character.