Firstly I really dont get CC, not something that has ever felt right for us as a family. Also the baby next door has been left from a very young age (a few weeks old) to cry. He's now 5 months and she just leaves him to cry. In the daytime she leaves him crying often as well as night. She'd never ask for help or accept it and likes to be seen as coping and superwoman. He dp is a medical prof and works long hours and she has an older child too.
I can sypmathise that she might be struggling but it is so hard to hear this little babies crying ds1 9 often comments and says how upset he feels hearing it and that his little brother never cried like that.
And I do know for a fact she does cc because she told me so I'm not presuming.