Dealing with toxic family

Just needing to vent about an awful experience I had over the weekend. I planned a nice evening at my house being a host to my sister & cousin. I’ve been in my house for at least 3 years and I’m big on picking & choosing who & when I want to invite people to my space. So I finally decided to invite my cousin over(who hasn’t seen my home) & also my sister (who has been over to my place plenty of times) for what I thought a nice evening. When I say I enjoy planning & hosting… I really do. So I go out my way to have a nice spread of food & etc out for them. Once my cousin arrived, here comes the annoying comments left & right. long story short, she was basically being nasty all evening. No appreciation, gratitude or thanks. Just being simply nasty. She definitely gives off insecure & jealous vibes (because she acts like this with everyone) But my solution is to never invite her over again. I’m just disheartened that people are really this coy, miserable, & nasty. Just imagined doing all this preparation for someone to come to your house & act like that?? Wild. What is also wild that she claims to have close cousin relationship with me & my sister. So as a cousin who claims they value their only cousin bond(because she burn the bridge with the other ones), why act this way? Of course certain comments I let roll off my back but others I didn’t. But of course when I responded to Her comments in MY HOUSE it’s “being sassy & spicy”. No ma’am look at you! Moral of everything in that experience, I realized that the older you get people will forever be miserable, jealous & insecure. No matter if it’s family, friends & etc. So now on, I’m really keeping my distance from her. & I pray that God heals her insecurities…Cause she needs it lol