let her Understand owning the land require money, maintenance, cukai etc. you are doing nthg on the land, why waste the money?

let her know, its not the only land mum is giving u. if she so sayang the land, tell her you are ok trading with her, meaning u give her ur portion for this land, she give u other lands' ownership. semua follow market value. then u will have one whole plot, she can own this land fully (together with mr J) as well .