Advice needed!! Uninvited my sister to our destination wedding

With out going into a long story my sister blew up on me calling me selfish because I assumed she and her fiancé would drive my future sister in law to the airport after we all went dress shopping (we drove over an hour to her house near Philadelphia and he offered to drive us into the city so we wouldn’t have to park). After we dropped my future sister in law off at the airport and drove back to my sister house she went off on me about how selfish I am for assuming they would drive her to the airport (15 min from the dress shop), that she should have taken an Uber, that I shouldn’t of even invited her. Granted my sister In law has done nothing but be supportive and excited for our wedding unlike my sister. I apologized to her and her fiancé but the last straw was when she started saying that my fiancé is “the worst person she’s ever met, he’s horrible” For no reason my fiancé has never done anything to her and he even helped her move! At that point I told her don’t come to my wedding. The problem is that we are having a destination wedding and she and her fiancé already booked their tickets. We are having a VERY small wedding only about 8 people. I don’t want someone who isn’t happy for me and my fiancé or can say such awful things about him at our wedding. Or for her presence to make it awkward or dampen the mood since this was about a month and a half ago and she has not reached out what so ever. Advice???