help and advice

[humberside]

Hello. My 10 year old son has been sleeping at mine for past 7 weeks. His mother gets the child benefit, Disability Living Allowance, etc. She keeps saying she will give me some but apart from £20 is all she has given. Our son has been to see his mum but not stayed the night. Advice on how to get the benefits transferred without his mum getting angry. thanks in advance.