I have a fantastic step daughter and this weekend we shared the news that we are giving her a baby brother or sister - and she is overjoyed. I know she will go home and tell her mum and I'm ok with that, next I expect that her mum will text my mother in law to confirm the news and I have asked my mother in law not to confirm anything - simply because my step daughters mother is truly awful to me and over the years has verbally abused and even once physically assaulted me, I don't want her knowing anything about my life and although it will be confirmed in time with natural progression of the pregnancy -  I don't feel we owe her any explanation. Just 1 week ago I had to change my number after a barrage of horrible texts. My MIL has asked why she can't just text back to say yes she is pregnant and I got really annoyed to the point is told my MIL to respect my decision otherwise I will have no choice by to keep any future baby updates between my husband and I only, now I know that bit is over the top..... but am I over reacting by saying I don't want step daughters mother to be answered when she asks if I'm pregnant? I just feel like she has caused me so much grief over the years she isn't entitled to know what's going well in my life?