I breastfed my DD until she was 16 months and got the occasional 'when do you think you'll stop?' type question from my family but it was never in a critical way. My mum never had the opportunity to breastfeed any of us but understood why I wanted to.

We only stopped because I got really ill after my m/c and was in hospital for a while afterwards and it all got a bit much emotionally and physically.

Good luck with it, I hope you have many happy months of b/feeding ahead of you!