TN government employed(both) couple, after marriage bought a house jointly in 2017. Sale consideration 15 Lakh. Actual price 36 Lakh. Wife paid 15 Lakh(cheque) Husband paid 21 Lakh(cheque) . Husband died without making will. Couple has no child. Mother-in-law filed case against daughter-in-law asking 1/4 of 15 Lakh. The husband's bank ac was closed by wife 4 months before. Is it possible for MIL to get son's(diseased) bank transaction details to prove 21 lakh payment by her son.