My husbands siblings keep asking for money

I hate to say this out loud ... I love my husband but his siblings are a bunch of bums. His sister has 6 kids and a boyfriend (who isn’t even the baby’s father), yet they are always asking for money on my husbands pay day. He can give them about $125 every month. I try and tell him it’s not his responsibility but he does it anyways because “his family is important to him.” I understand that family is important, but I wish he can see that they may be using him. Sure, they can be struggling, but how is that our fault? We are struggling too with rent and bills. I can get paid minimum wage and it can only cover half the bills. Yes my husband makes enough for us live comfortably but that doesn’t mean that we should be living uncomfortably at the sake of his sister (who ISNT EVEN TRYING TO FIND A JOB!!) Besides his sister; his 19 year old brother is living in Australia while him and his partner live off of her family. They both are jobless, taking care of an infant, and continuously asking to borrow $50 every week or so. AND MY HUSBAND GIVES IT TO THEM. Trust me, I don’t feel good about talking about a struggling family like this but they have complete control over changing their situation. What should I do? Leave him?

Edit- you are right @sierra. It was wrong for me to mention how she wasn’t with her baby’s father. It doesn’t matter.