@meesh1070 It's an asian thing for sure, can't run from it. I see it as a way to get blessings and a "feel good" gesture on my end. It doesn't have to be straight up money though for your case, maybe just stock up the grocery and take care of the general maintenance/ bills. Leave the mortgage to them.
So this way, they'll be happy you're willing to contribute a little bit more in a way that's not hurting your savings that much. But also, leaves you room to save comfortably and maybe in the future help them pay off (if they ever need them just in case)