My brother got a vehicle loan from private finance in 2019 and my mom signed a grantee and she gave

My brother got a vehicle loan from private finance in 2019 and my mom signed a grantee and she gave her documents for reference after 4 month due to corono issues he lost his job and finance party had taken the vehicle for non payment of dues after one year we have sold our property and me and mom decided to gave him share and we did and came out after 5 months finance party put attachment for that saled house how is it possible and also now finance party tried to chese that property and house owner says we going to take an action against your mother for not informing this before house sale I dunno what to do my bro had no money and we don't have too now what to do that finance will take our saled house or what will happen next or what will do next pls advice loam amount is 6 lakh and saled car by 4 lakhs pls help me my mom age is 63