Cutting out the Drama

I have a very dramatic family. I have two sisters, and no brothers so you can imagine the gossip that went around growing up. But I’m in my late twenties now and the drama is still going on. Out of us three, I was the only one who graduated from college, learned to manage my finances, and marry a wonderful man who takes care of me. My two sisters didn’t. Lately one of my sisters has been having trouble financially and my hubby and I have loaned her money already twice this year. She’s pregnant and has been in and out of work. That last loan we made an agreement if she goes back to work and makes an effort we will loan her money. She agreed, but found out this week she hasn’t gone in to work so now my hubby and I feel like we enabled her. We’re also throwing her a baby shower. Well my sister and I got in it today because she lied to my about going to work and said it was none of my business and that she’s using her vacation time. And I agree, it’s not my business. But hubby and I don’t want to have another loan boring conversation 3 months down the road. Anyway, she said I was “high and mighty” and I push people away ever since I met my husband. She also told me to cancel the shower (which is tomorrow). Speed things up and we’re fighting about things from the past that we had no control over as kids. She has displayed a lot of ungratefulness especially since my hubby and I have helped her tremendously this year. And she stills always calls me selfish, implies I am snobby, tries to manipulate me etc. what should I do? I am tired of the drama and she only seems to be getting worse. I am thinking of cutting her out of my life. It’s just so hard because I won’t see my nephews and she is my twin. Need advice please.