i wouldnt worry about it hun. no way is a one yr old too old for booby!

my philosophy has (and always will be), "when they can remember it,its time to stop".even if we both are enjoying breastfeeding at the time. i would be traumatised if i actually remembered suckling my mothers boob. i wouldnt want my child to remember suckling my boob. imagine a poor teenage boy remembering that!! LOL.
just my opinion,no offense to anyone breastfeeding older children.