My parents have stopped making jokes and comments about my dog's age and her dying because they saw how much it upset me. We've had her since she was 6 months old and she's twelve now. Hopefully you'll parents will really figure out how much it hurts you. I understand your feelings. *hugs*
It's hard to comprehend the fact that they aren't going to be there one day isn't it? Just spend as much time with your dog as you can. I do hope your parents start to understand.
"And somewhere in the northwoods darkness a creature walks upright. And the best advice you may ever get is: Don't go out at night..."