Turn off the television and teach your children how to think.
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*I do not read or write anything in the "Comments" section.*
I'm not quite clear on what you're asking, but here's what I think.
jkgrandma, as usual, says it right and straight. I accept the fact that you don't like Florida but a two week stay twicrepetitive phrase e or three times a year is not so long especially when you know that you will soon return. The visit will give needed support to your sister and even a chance for a short vacation. She will know she is not alone and bearing the full burden. But more than anything else, as JKG puts it, "Take advantage of whatever time and opportunity you may have to spend time with your parents. They are in their 80's and may not be around much longer." And then you will never have the opportunity to speak to them, to ask them something and even to get a warm embrace. The two week periods will also make your husband feel that he is still No. 1 in your life. Go for those visits, you will never regret going, NEVER!!