Should I expect my wife to help with bills if she starts to work?

My stay at home wife and mother of our two sons has informed me she wants to look for a part time job so that she help me with the things I usually pay for related to her personal care, clothing, etc. Is she really helping me if all of the money is being spent on her? I told her I would have been more content if she had stated that half the money earned would go towards paying some of the utility bills and the rest she could spend it on what ever she wanted. I don’t think her reason to work is the correct one since we have over $15,000 dollars in unsecured credit card debt aculated by me wanting to satisfy her every need. I know I’m to blame for letting this happen for too long. I'm I overreacting or is she right to do whatever she wants with her money while I continue to be the only one responsible for paying our two mortgages, credit cards, car insurance, grocery bills, gas, utilities, etc, etc, etc.