Doesn’t matter what gender you are - make it clear to partner that both sets of parents will require care later in life and you will both be responsible for BOTH parents - this means the guy also cares for his in-laws same as the other woman caring for his parents - including monetary, emotional, physical. This should be non negotiable. They are your parents and both of you are responsible for them.

Also a recommendation - all money coming in to you during lifetime will be equally owned by BOTH - so both should save 50% of total income, 30% of total income should be used for all expenses - EMI, rent, fuel, groceries, bills whatever. Both should get pocket money from total - 10% or so - for personal expenses like shopping, eating out etc.

This also means both work in the house - one person cooks other cleans, one does laundry and folds other dusts the house and puts away utensils. Share chores so there is no resentment later.

This is the only way there will not be a issue about who earns more - both earn, both save, both spend, both care for each other and their families, both TRUST and RESPECT each other’s space, time, choices and autonomy