I agree with what folks are saying here. It can be an agonizing decision. No, of course you are not an idiot!
My brother received a kidney from my dad 13 years ago and it is still going strong.. and so is my dad for that matter.
The transplant centers always do a very thorough work up to determine if someone is a good candidate for a transplant. I understand what you are saying because I would have a difficult time accepting a kidney from my son as well. What I am saying is that if they are determined to help you, it might not hurt to work through the process. Then you will be well informed and you can still say no even if the kidney is a good match. Your family may feel more comfortable with all of these decisions if all of you know the details of what is being considered.
Just my
... I hope that you make a decision that you feel really comfortable with.
Take care and keep us posted!
Tracy (aka Loopywinks)