I don't know what your weather is like now, but if it isn't too bad, are you trying to go for walks at least once a day? We always tried to go 2-3 times a day depending on the weather. and trying t increase the distance a little each day. IF it is real hot or cold, sometimes we would go to the mall and walk, unless it was a really crowded time of year.
Did her doctors give her a plan of what she should be doing when? As for the ironing, I think how much she should do, would depend on how heavy is her iron, if it is one of the older heavy ones, I would start with just a few things like you suggested and see how she feels/if she gets sore even later.
Don't feel bad about you being exhausted, It is completely normal. I usually get pretty run down after Justin's surgeries, between the stress lack of sleep ect
ps don't try to guess by what others post, Kiwi is much younger than your Mom ect and even people of the same age, have very different recoveries, alot depends on your shape before surgery, and complications Age ect