Sister makes plans and then cancels last minute? Would I be wrong to stop inviting her out?

Anonymous
Hi so I am 20 and my sister is 25 and she makes plans with me to do stuff but she keeps canceling them for dumb reasons or she always has an excuse. by the way, me and my sister live together in our parent’s house and tbh, our parents car a pessimistic and narcissists which is not fun to always be around. I like to be out of the house because I like outdoor and there is nothing to do at home anyways and I’m not a homebody anymore.

Anyways, my sister always complains about how boring it is and I try to come up for something for us to do and she will agree and then around the time the day comes, she plays stupid like she doesn’t know what I’m talking about or her favorite excuse is “I’m trying to save money.” It’s not like I’m making a trip that cost hundreds of dollars so it just doesn’t make sense. She just really cheap and she always wants to get something to eat, then go to the park and then she wants to go home to eat and tbh, that is not fun at all. I can do all of that alone.

On Friday me, my sister and my friend are supposed to be going to 6 flags and my sister is the one who planned it but she hasn’t said anything about getting tickets or anything like that since we’ve talked about it on Saturday. I already know she is going to have an excuse for why she can’t go like “it’s going to rain so there is no point on buying tickets.”

I’ve already tried talking to her and I told her it’s really starting to annoy me how she she always wants to do this and this but she can never go through with it. I told her if she cancels this time, I’m just not going to invite her anymore. Am I wrong?
Sister makes plans and then cancels last minute? Would I be wrong to stop inviting her out?
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