What are the consequences for a remorseful man whose Christian ex-wife became pregnant by him after their divorce, and what is the Islamic legal status of the child, is it considered illegitimate, and what can be done to make it legitimate, and what is the man's responsibility towards the child if it is illegitimate, and does this affect his future marriage?

The fornicator must repent immediately and sever his relationship with the woman. Sincere repentance erases sins by the will of Allah. As for the pregnancy resulting from fornication, it is considered a child of fornication, and its lineage is not attributed to the fornicator according to the majority of jurists. Whoever repents, Allah will not hold him accountable for his sin. The couple is advised to establish their marriage upon obedience to Allah and to avoid disobedience in order to seek blessings.