The great Hanafi Jurist, Imam Abu Jafar at-Tahawi (may Allah have mercy on him) states: والذي يؤمر به الولد في هذا غير مبيح له فيه طلاق زوجته في الموضع الذي نهاه الله عز وجل عن طلاقها فيه، وإنما هو طلاقه إياها في الموضع الذي أباح الله الطلاق فيه لا في ضده Translation: It is not permissible for a son to issue a divorce to his wife in obedience to his parent in a situation where Allah has prohibited from divorcing her. However, he is duty-bound to issue a divorce in obedience to his parents in a situation where Allah has permitted to divorce[5]. Mulla Ali al-Qari (may Allah have mercy on him) states: فلا يلزمه طلاق زوجة أمراه بفراقها، وإن تأذيا ببقائها إيذاء شديدا؛ لأنه قد يحصل له ضرر بها، فلا يكلفه لأجلهما Translation: It is not incumbent upon one to divorce his wife when commanded by his parents, although the parents are afflicted with extreme harm if he does not issue her a divorce. This is because the son himself could be harmed, thus he cannot be coerced to bear harm because of them facing harm[6]. Similarly, Maulana Ashraf Ali al-Thanwi Saheb (may Allah have mercy on him), in Imdad al-Fatawa [2:465], and Mufti Mahmud al-Hasan Gangohi Saheb (may Allah have mercy on him), in Fatawa Mahmudiyyah [19: 33], explain that if there is a fear of the man not being able to bear the consequences of the divorce, or one fears he will be harmed or he will fall into unlawful activity, such as fornication, then he should not divorce his wife in obedience to his father[7]. Furthermore, Mufti Muhammad Taqi Uthmani Saheb (may Allah preserve his shade upon us), in Dars Tirmidi [3: 503], adds that if the son is forced by his parents to issue a divorce without any valid reason, then he should not divorce his wife since it will result in injustice to his wife[8].

Furthermore http://askimam.org/public/question_detail/28048