The percentage chance that Sims will marry after having a baby. Default is 0.
This is checked each time a Sim gets pregnant if they're not already married.
For moving in, lowest value tries to move-in with higher value if there is room. Otherwise, they try for lower value.
If there are no children, the move happens fine.
If there are children and no other adults, the children have to be moved as well to prevent orphaning.
If there are children and other adults, the children are not moved unless Pregnancy_MoveFamilies is true and
the children are the offspring of the moving sim.
Definition of children sims are any sims that the game framework doesn't allow to live in a household alone
so babies, children and teens.