My mom doesn't want any kind of service. I would still go. She has been twisted by "the truth" but is my mom and I love her. No one in the hall will do that for a widow of a non JW who is not a pioneer or even aux pioneer and who forces herself to answer at meetings. She buys most of it, forgives it the rest. Iguess that is what she does with her kids too. Sees the good in us and what she doesn't like, she gets over and loves us anyway. That is what family is for.
OTOH, if one of them starts in on anything to do with their belief system, I will firmly remove myself from the scene. Maybe not in a particularly gracious way (no scenes, just not gonna pretend to be interested just to be polite.)
And next time, if they want to give her blood, I will simply keep my mouth shut. If there is an emergency, I now consider blood a don't ask, don't tell situation. If she states her wishes-fine. If she can't. I'm silent. Her last few surgeries were done w/o the need for blood, butthey scared the pee outa me knowing she wouldn't get any if she needed it. She is nearly 80-its not our biggest worry at this point, but who knows? She shows few signs of aging, actually.