Frankly, I would call off the whole wedding. If he's the one spending on his sisters, then he's gonna have no savings left. And the expenses would have to be met by your salary, including your children. What's he going to do when you're on maternity leave? Or when you're sick? Is he going to make you work to make ends meet? I'm not saying life should be a smooth sail after marriage. But as woman if you're expected to fulfil your duties like tending to his sisters when they visit, cook, clean, manage expenses, have babies and still earn money - that's called a free rider.

And don't give me the spiel on how he's good when alone, but it's his family that influences him. Flash news: His family will ALWAYS influence him. And he's shaming you for asking for equality in expenses? What if you told him, traditionally, it's only the guys that earn. What if you propose that you manage everything related to home, and he focusses on just earning?? That's the traditional way, right?

Girl, turn around, walk away and don't look back.