So tired of SO's psycho ex

She's caused no end of trouble for us such as making reports to Children's Services (8 investigations, all coming to nothing). She's tried to split us up by saying she has info my SO is cheating. She says things to her son about his father that are entirely inappropriate. The list of things is endless and there's something new every week. 

We don't retaliate or talking about her negatively in front of the child because we don't think it's appropriate and that it will only screw up his little mind. We just try to rise above it and do what's best for the child, co-operate with CS, etc, etc. 

My SO picked up his son today for contact and he met his baby brother for the first time.  Virtually the first thing he says is that his mother said that his brother has a big nose and looks like me because he's ugly. WTF? How sick in the head are you to say something like that to a 5 year old, knowing they're likely to repeat it? And how messed up are you to try to sabotage the first meeting between two new siblings? 

My hormones are raging right now so I'm upset and trying desperately not to show it in front of my SO's son.  I've just had enough of this psycho's behaviour and need to vent 😢