Wife and parental property rights

Hi I'm a homemaker. I have a so n aged 16yrs. I need legal advice for 2 matters. First, My husband is a narcissist. We're living separate past 1yr. We don't share any intimacy past 8yrs. I suspect he has extra marital affair with his boss. He manages major expenses. He's working in multi national and earning decent. And gives me 10k including Personal expns money to me every month. But if I need extra for imp things like med chkups, son personal expns etc he says no money left. He's living with his brother who's sober alcoholic and not earning much. My husband prioritise him over us and pays for his major expenses. And that's one of the reason for his getting short of money I guess. And he had got will made where he has made his brother guardian to my son. But not mentioned my name anywhere. When I asked him for a copy he said will see only after his death. Any advice on How I can safeguard my n my son's rights. Second issue is my parental property. My parents have left 2 houses. One both my brother's have taken and second one gave to me. It's only later I came to know that the property they gave me has lot of paper work pending. It's on leasehold. It's sale deed isn't yet registered in my mom's name. Hence I couldn't get RDeed signed. Dealer says all paper work will cost huge amount which I don't have. Only option is I sell it and pay for the paper work from proceeds. But I wish to keep it and rent it out for sometime since property in Delhi is of high value than in Jaipur. So need advice what steps I need to take. Thank you 🙏