I do not find it strange at all to be nursing a preschooler.
I'm a closet nurser.
I definitely say to each their own, but personally I would not nurse any of my children that long. Now pumping and giving it to them would be another thing to consider, but actually having them nurse on me, no. This is my first baby, so having never nursed before my goal is to nurse until at least 9 months. I would like to make it a full year if possible. But I already plan on not exclusively breast feeding. I am going to get a pump and when the baby is a little older will drink from breast milk from bottles too so that if I need to leave my husband or family member can feed him. As of right now our plan is for me to stay home with him anywhere from 6 months to a year before I go back to work. So when I do end up going back to work plays a role in that too. The sooner I want to get out of this small house and into a bigger one, the sooner I have to go back to work. But I will not leave him before 6 months unless asbolutely necessary, like if my husband was no longer working.
My SIL breastfed my nephew until he was slightly over 3 years old. It was embarassing to them, especially my brother, because I think they wanted to keep it a secret, but he ALWAYS asked for it, even in public. And it made it very difficult for them to leave him with any babysitter, especially over night because he would cry the whole time asking for her because he wanted to nurse.
Callie has spastic diplegia cp (meaning it is in both of her legs).
For Callie's diagnosis, 4-5 years old is AVERAGE for learning to walk...so he was right in with average it sounds like.
Sorry to hear about the surgeries and such.