HI...I have a feeling my reply could be pretty long....I sympathize. This all stinks...it's hell...how could there not be negativity at times?
We as caregivers feel responsible for health decisions, the comfort our loved one, their happiness, their pain, their fear, their finances, their homes and pets, informing family and friends,their transportation, their appetites and on and on. Are we responsible for ALL of that...I would say no, however, it sure does feel like we are.
My brother lived with a grade II astrocytoma for 10 years...during which time he had focal seizures,fatigue and such, but all in all he felt well and did almost everything...Normal? Hell no...we kissed that good-bye with the diagnosis. He too had to give up riding his Harley (he had to wait about two years to get it, as he ordered it new..it got delivered in Nov. 1999 and he so, so looked forward to the next spring when he could take it out and spend all summer and fall on it too...He got diagnosed in March 2000. His son was born in August 1999 (his first and only child)...
He, like your sister, has NEVER shown an interest in learning, really learning, about his disease. He spent those ten years very much in denial and at times that so frustrated me I could have climbed on the roof of my house and screamed at the top of my lungs until "they" took me away! It was his way of coping...he did not want to give it up and I had no right to try and change that (not too much anyway :)
In that ten years we begged him to take his son to Disneyworld...they had opportunities to join us on trips to Europe, we begged him to move closer to us...he was in some depression during that time...had old furniture, had old carpeting, he slept on a ancient mattress...he had the means to make changes and do these things...it broke our hearts to see this...if we suggested maybe getting him a mattress as a gift or something he became enraged....And you know what?
When the tumor came back as a grade IV and he could not do any of those things anymore......he would sometimes be wistful about the past and say..."I wish I had done more..."
Quite frankly if I had had a choice between hearing those words and having a hot poker pressed against my back I am pretty damn sure I'd have taken the poker and it would have hurt alot less.
When the tumor came back he said once..."I did not know this could happen"...of course he did...it's just the way he chose to deal with it.....Not only does the illness hurt, but so do all the lost opportunities.
However...many opportunities remain. While YOU are NOT responsible for her happiness I sure do get that you want to make her happy and will continue to try...maybe lower the standards and try some little something...we visit my brother in rehab every day...we take his favorite foods, sometimes we take a movie...last night he was well enough to play cards for a little while! We tell him funny, stupid stories about things that happen to us...we take his dog to rehab to visit him...we call him on the phone...little things...thats all thats left now...there won't be any trips to Europe or Disney...we just do what little we can and sometimes nothing works and sometimes, like last night, we laugh and joke and walk down memory lane and its a genuine good time....Please...you are being too hard on yourself...just try some little things and if they don't work of course you will be sad, but please don't feel responsible...we can be so hard on ourselves and it just make an extraordinarily difficult situation even more painful. You are a great sister, she is lucky to have you. Go easy on yourself.