public void setMother(Person mor) {
if (mor == null) {
if (this.mother != null) {
this.mother.children.remove(this);
}
this.mother = mor;
} else if (mor.isFemale()) {
if (this.mother != null) {
this.mother.children.remove(this);
}
this.mother = mor;
this.mother.children.add(this);
}
}
