They excreted, mom licked for them.
If they did excrement out of the toilet, mom cleaned up after them.
Even their food, mom carried to their mouths.
Reimu only sought to bring her little ones joy when taking care of them; that made the situation worse and worse.All the more so for yukkuri.
For them, the most important thing is taking it easy; everything else is equal to dust. Even if their beloved mother asks something of them, they simply ignore it if it's completely uninteresting.For humans, education is something that contains few fun things .The interest of children is normally only directed towards that which they find enjoyable; even if they know it's important to learn, they cannot be eager about things they do not find interesting.So her education didn't see any progress at the fourth day, and the little ones still relied on their mother for their excrement.For Reimu,
Nothing was more unbearable than her little ones cries,
and she regarded all things they hated as taboo,
and did only things they pleasured.