Claim by grandmom to take house back sold to my mother under sale deed

We have a house in kishangarh. Half of it was taken by my father's brother. My father is eldest of 5 brothers. The house was distributed by my grandmom to 6 people. 5 brothers and one share dadi kept for herself. The house was done two parts. one part p1 to three brothers a, b and c. The other part p2 was given to brothers d , e and dadi. Brother d purchased part p2 by paying 6.5 lacs to e and dadi. Brother d requested brother a to purchase part p1 for months because brother b and c were in great need of money. Finally brother a son got loan looking at their need and agreed to purchase. Non one lived in this house, dadi used to stay once in a while and she lives here from 40 50 years. All were staying out in different cities. She is very rude and clever. No politeness. She doesn't care u die or live just wants her selfish interests fulfilled . Now brother b died. Brother b wife and son came to stay in the house. Same time I also came here during lockdown and had to stay here and now planning to stay here.i am brother a son. Brother a took property in name of his wife w1. Dadi and brother b family having constant fights. But still trying to get together as dadi needs some support and these people also need. To get away from being used up in the fights that I m the cause of the fight which they did, and to work peacefully I shifted in tin room upstairs after 2 months. Still The fights are on since 8 months. We talked to selling the house to brother d and purchasing something else but dadi and family not ready to give money and finding ways to take the house back. Brother a had to give 7 lacs to brother b and c. He kept 1 and 1.6 lacs pending to each . On time of helping he had said that we are taking loan to help u and will give rest money slowly. During talk of selling dadi got a taste of keeping the house back. Dadi is now trying ways to get hold of it. I recorded her talking of putting a case for kharcha. In that case of kharcha can she get the house back sold under sale deed? Or any other case which can be used by her to take back the sold property. We just want to pay off the remaining Money to brothers b and c but if a case is possible then why to put more money in sink? Already they took money and still want to take the house back. Brother c helping dadi because he can again get hold of share. It's not a gift deed but a sale deed between my mother and my grandmom. As per sale deed 11lacs paid off and that is the value of property. Money remaining is informal money which was agreed between brothers and that is pending. We ready to pay off. Should we get noc from brothers for money received or what can be done to ascertain that the house is safe to pay off remaining money and even kabja case can't be done by dadi?