Hi ladies what’s your opinion?

So myself and my partner have 2 babies and one on the way. Both babies are still in nappies and money is super tight

My sister in law has recently broke up with her partner and she has a child of her own. She had started a job and she gets money from her benefit but lately she’s been asking us to buy her baby things like nappies we didn’t mind at first but now I’m starting too because we are trying to look after our children as well last shop we brought three boxes of nappies two for us one for her it was almost $100 😭 I want to tell my partner we can’t keep doing this

What do you think?