I have a child with me full time while mom is on mat leave and another about to start when his sibling is born later this month. What the moms feel is that they would be so busy with the new baby and bathing, feeding, etc. bound by sleep schedules that the child would have a lot of down time to entertain themselves. Instead they are at my house playing with friends, learning, etc doing things at their level. It also gives the mom a chance to catch up on sleep lost and housework done so that as soon as the child is picked up at night then mom is able to devote the evening to just the first child. It is working out well for them and child is totally fine with it. His sibling will start into daycare end of August. The mom has done some mommy and me classes with the baby like swimming, etc. that she wouldn't be able to do with the older child around unless they went into the gym daycare or whatever so many moms want to give to their subsequent children all of the advantages they gave to their firstborn. As the mom of 4 I can totally see how each child was effected - missed out, changed circumstances as each new child came along.