stepmother
US /ˈstepˌmʌð.ɚ/
UK /ˈstepˌmʌð.ɚ/

1.
Stiefmutter
a woman who is married to someone's father but who is not their biological mother
:
•
My stepmother is very kind to me.
Meine Stiefmutter ist sehr nett zu mir.
•
She has a good relationship with her stepmother.
Sie hat eine gute Beziehung zu ihrer Stiefmutter.