I'm supporting my lovely cousin through a painful separation with her child's father.
She moved in with him, into the house he shares with a friend when she found out she was pregnant.
It was a very difficult birth and my cousin found it very traumatic. She does have self confidence issues after having a damaged relationship with her father.
The relationship fell apart towards the end of her (paid) maternity leave and he went away for some 'space' (you know what's coming don't you?)
He came back and begged her to start again and then a couple of weeks later asked her to leave as 'it's not working'
She left with the baby and moved back in with her mother and step father. That's where they are living now.
Turns out (of course) there was another woman (with child from previous relationship) all along.
OW is now pregnant and ExP has now reduced my cousins money by £75.
He says if she goes to CSA she will be £70 worse off again?
He said today that my cousin is using the money towards a deposit towards house, not on the baby!! 
At the moment all communication is going through me, to help her maintain no contact to help her get over him, and I do want to help, but am not sure what to say and do next?
When I have seen them together, he does make belittling, controlling comments to her and about her.
advice welcome.