Your immediate family is now your husband and kids. But it doesn't mean you will totally neglect your parents. You can tell them that now that you are married, you can only give them X amount because there are also other expenses/bills that you need to settle in your household.
That's a difficult situation, but your parents should be able to understand that you have your own family to feed now. Make it clear that you will still support them in other ways, just maybe not financially.