Hi Aurora, as has been pointed out, breastfeeding has a dose response, so a little is good, and a long time is better, as far as the benefits that your baby (and you too) can get. Regarding the tandem feeding idea, I have not done it myself, but I have spoken with women who have, and they have all said the the tandem feeding actually reduces jealousy and sibling rivalry. Of course, if you don't like the idea of tandem feeding you shouldn't feel obliged to do it, and in fact some babies self-wean when mum gets pregnant again anyway. But you might like to talk to people who have experience of it before you discount the possibility completely. I would suggest that you maybe don't need a goal/deadline for how long to breastfeed, but just go with the flow and see how it works out. Don't wean at 12 months just because you have decided that looks like a neat cut-off point. But don't keep going for 5 years if you're hating it either. The best answer to how long to breastfeed is for as long as both mother and child want.