Is you friend getting her child support through the CSA? If not I would suggest she does. That way it should be fair for both. My ex is a right s**t when it comes to maintenance and after 7yrs of fighting him (difficult cos of the abuse I suffered during our marriage) I have finally found the courage to use the CSA. I have been told I will be getting a lot more than I have, and they will enforce it. If it is done through the CSA, your friends ex will have to discuss it with them. I wouldn't think they will change anything until the baby is born, as circumstances may change. Tell her to discuss it with the CSA even if she doesn't currently use them, they have been really supportive to me. Good luck, let me know how it goes.