For my sisters, yes, I'd be happy to donate eggs, carry theirs or use my eggs, my womb and their husband's sperm. For anyone else, I'm not sure, maybe a couple of my best friends or a couple of my cousins.
I'm 29 and have had 5 wonderful preganancies, I'm happy with 5 and am off the view that if it happens again in ten years, lovely, if not ah well.
My dad has donated sperm to his brother, they're identical triplet brothers and both donated sperm so we don't know whose the child is IYSWIM, any of them could have fertilised the egg so that does make it easier. And the fact that bbeing identical, genetically they'd be this close to the child anyway.