Mmmm what do I do...

So I was adopted at young age & my bio mother is in my life now and my adoptive mother hopped out of my life. Anyways since spending time with my siblings & I’m the oldest out of them do I have to pay for everything ...? Lol like I don’t work rn but my husband obviously helps me out but every-time my siblings are over I have to pay for their food or whatever they want ... when 2 of them work and they all live w/ my mom. I feel rude saying anything ...