Currently, DH pays £410 CSA for his 2 children. When DSS1 starts university in September, DH will be paying around £310 CSA towards DSS2. However DSS1 has made comments about coming to live with us at this point.
Obviously this is going to cost us in terms of extra food and gas/electric. How much do you think it would be reasonable to ask from him towards his keep? (given that we're paying his mother £310 towards DSS2)