andersoncaseylee246

Well, this might be true for other countries, but here in the US of A we define a full sibling as having the same mother and father and half-siblings as a having one same parent and one different parent always a half-sibling not a full-sibling according to blood.

for example:

use the key below to follow along on United States of America samples of full and half sibling

SM=Same Mother

SF=Same Father

DM=Different Mother

DF=Different Father

SF and SM have two children one is a boy(FSM(Full sibling male child) and one is a girl(FSF(Full sibling female child) and they are full sibling to each other

SF divorces SM and SF married DM and has a child another sister(SFDMdaughter) is a half-sibling to FSM, AND FSF

SM married DF and has a child, a son that son(SMDF) is a half-sibling to FSF and FSM, but however SMDF and SFDM are step-siblings supposedly.