Your step sister's husband is your step brother-in-law.
sisters in law
She is your sister-in-law.
I cannot see why not. There is no blood relationship between you and your sisters ex-husband.
sister in law
Your sister-in-law.
your brother-in-law :)
Brother-in-law.
brother-in-law
he has a brother in the guards,married a girl called fiona kavanagh who did work for g4s with my husband
Mum's sisters husband is Masar Ji in Punjabi
Your sister's husband is your brother-in-law. It does not matter whether you speak of your elder sister or another sister, the same term is used for the husband of any one of your sisters.