Your adoptee or little people life bar (energy, health,hapiness, fed) is half full and your couple must have one or both it would be nice or definately for wanting kids. you put your little people on each other near the bed of sofa. do it until they say trying to make a baby. If they argue just continue to do it again. if it says too soon to have a baby you must wait for an hour or more. after they have a baby, make the baby aged 1/2/3 then send the child to boarding school. make a baby again, then you will get a baby... repeat it again and again... praise the little people twice while make baby.