More Sister Drama

If you saw my previous post, then you know my sister was trying to get my parents to give her thousands of dollars in cash even though she wasn't planning a big wedding. She got married on Friday (also my husband's birthday) at a court house. She has since messaged everyone in our family telling us she is now accepting wedding presents. We were not invited or even supposed to know about the wedding. We found out because she posted it on Facebook and she is still friends with my husband on Facebook. Are we wrong for not wanting to get her presents after literally telling us she hates us and wants nothing to do with us? Or for accusing my parents of abuse and favoritism? I am honestly at loss for words. On a side note, she was maid of honor in my wedding and didn't give us even a card so I also feel like since she didn't give us anything we shouldn't be expected to give her anything even if we were on speaking terms which we definitely aren't.