Well, honey, your step sister's husband is technically called your "brother-in-law." But let's be real, he's just that guy who married into the family and now has to put up with all your craziness. Just make sure he knows his place at the next family gathering!
they would be called step sisters or step brothers
step father in law
The plural form of step-sister is step-sisters.
Husband in-law 2nd Answer: Actually, it's 'Brother-in-law'.
Hitler had 3 brothers, Gustav, Otto and Edmund, and 2 sisters, Paula and Ida, as well as a step-brother, Alois and a step-sister, Angela.
sisters in law
Hitler had 3 brothers, Gustav, Otto and Edmund, and 2 sisters, Paula and Ida, as well as a step-brother, Alois and a step-sister, Angela.
Cinderella's step sisters are Drizella and Anastasia.
Her step brother and sister are called Courtenay (actual spelling) and Michell
Your mother's new husband is your step-father and you are his step-son or step-daughter.
She is your sister-in-law.
In a marriage in which both the husband and the wife have children from a previous marriage, the children are step-children to the parent who is not their bioloigical parent, and are step-siblings (step-brothers and step-sisters) to each other.