Oh boy Sal, pretty dysfunctional. I think we all have a bit of this kind of thing in all our families. I wish I could give you the perfect solution but it seems like these attitudes have been built up over time, yours and theirs. Your sister obviously has issues and needs to be #1 with your parents. You can't change that. They will treat her the way they want to and you'll have to give up trying to control that. Also, witht he business situation, sometimes you have to cut your losses and move on. I know you've been basically screwed and had your rep tarnished but I think pressing the matter will get you nowhere and just open you up to more criticism.
The trips that you've taken your parents on is admirable, the good child and all that but you're being taken advantage of due to your need for their approval. If it was me, and I repeat, if it was ME, I'd not take my parents on any more trips and I'd tell them if they want to see their grandchildren, they will have to make the effort to be part of their lives. Sometimes creating distance for a little while helps you see more clearly and your parents badly need a little wake up call. Assert your boundaries and feelings and then leave it in their hands. If they want to be a part of your life, they have to put the effort in. Don't let yourself be abused or taken advantage of anymore.

Just my two cents. The decision is, of course, yours.
Good luck
tina

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