Perhaps you could make a little sewing kit for the 4 year old with plastic grid, wool and a big needle so that while he 'sews' you can too. Just imagine how thrilled his future wife will be if you teach him to sew on a button or two. But everyone is right - you need to put your feet up whenever you can. And at some point negotiate the amount of help and support in terms of time you can give without losing yourself. When things calm down and get into a rhythm you may find more pockets of time that are just for you.