Mother asking her children for financial assistance

Q: Is it wrong for a mother to seek some assistance from her sons, of which all three are working, even if her husband is working? My sons feel that I must first divorce my husband before they will help me or he must sell his car so he can have more money to maintain me. I only asked for R200 from each of them towards my medical costs. Please advise me if I am wrong in asking them for assistance.