You are pregnant how can you make your water bag rupture?

I assume you are desperately overdue. A fun way of trying to bring on labour is having sex. It might not be true but hey, make the most of it while you can. After baby appears, you may not have the time or inclination. Make sure sex is not too rough and maybe try different positions, like spoons, to accommodate your belly. Have fun!!! And good luck for your baby.