What about adopting, and at the same time getting the 3 of them pregnant with artificial insemination? Surely with the 3 of them pregnant and 3 adopted kids, at least one should be bound to survive beyond 9 months... actually forget that, just get them a pet, a pet rock that is, i don't trust any of them with the care of living animals.
This one was the less creepy one, but it is as sad as the first ones.