Long story short, I had a son after an extremely short relationship 16 years ago. I had an average paid job but under the old rules of the CSA I paid 40% of my wages, around £400 quid a month. 12.5 Years later I get married to a woman I love and we have an amazing little boy. We also brought a house together. I didn't tell the CSA any of this and carried on paying the £400.00 for around 2 years. The CSA then contacted me and asked for a full review of my circumstances, as a result they are now only taking £150.00 a month. I contacted my son's mother and we agreed to keep paying her what we were paying her as it was only fair on my son. However, a year down the line we could really do with extra cash. AIBU to ask the mother of my son to take a deduction of £150pm so we'd only be paying her £250.00pm a month? My son is 16 next month and applying for colleges. I don't have any contact other than the occasional phone, text, Christmas and birthday presents. Not that it really matters but she owns a house that she rents out, rents a house herself and has a decent convertible car. My Son has everything, and more, that he could wish for in terms of material goods. What I'm afraid of is if she kicks off?? I don't want to cause any stress or concern for my boy.