All perfect praise be to Allah, The Lord of the worlds. I testify that there is none worthy of worship except Allah and that Muhammad, sallallahu ‘alayhi wa sallam, is His slave and Messenger.
We do not know what would happen if the problems between you and your wife continued; it is most likely that divorce would take place again. The core of the problem between you and your wife may be the fact that she tells her parents what happens between the two of you, as you mentioned, and this led to their interference and then accordingly the situation got complicated. The spouses should try as much as possible to avoid problems, and if they do occur, then they should try to solve them without anyone else interfering. The parents should also try to reconcile between the spouses to the best of their abilities.
If you hope that there will be benefit in taking your wife back in marriage, then try to convince your mother to give her consent to it. If she is convinced, then that would be the desired objective; otherwise, you should know that you have the right to take your wife back without the consent of your mother in marriage if you wish to do so. The children's obedience to the parents is confined to that which is good (and lawful) and causes no harm for the children, as has been advised by the scholars. Please refer to fatwa 130549.
If you fear that the problems will continue, then let her go and do not take her back. Sometimes divorce could be the better solution. Ibn Qudaamah wrote, “It might be that the situation between the two spouses is bad and it would be a pure evil and harm for the marriage to continue by obliging the husband to provide sustenance and shelter and retain the wife despite their bad relationship and the state of continuous quarrel without any benefit. All this entailed the legitimacy of breaking the bond of marriage so that the harm would be brought to an end.”
Allah knows best.