Is your step sister's mom related to you?

Answer Your step-sister got to be your step-sister because her mother married your father. So her mother is your step-mother. That is how she is related to you, as your step-mother.

Top Q&A For: Is your step sister's mom related to you

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My sister's daughter (the FIRST "little girl" in the question) would be my Niece, therefore making me her Aunt. Once my Niece had a daughter (the SECOND "little girl" in the question) she would be... Read More »

How are half brothers and sisters related?

A half brother or sister is from the same mother/father and have a different mother/father.