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My name is XXXXX XXXXX I am a licensed, practicing attorney with 25 years experience in Family law, and will help with your question
1. If you paid for the doctor and hospital bills, you would have to sue him for reimbursement. However, in such an action you would have to also name your daughter in the lawsuit, that should be enough of an incentive for him to start paying. In addition, once you get a judgment, you can ask the Court for a Writ of Garnishment, serve it on his paymaster and a set amount would be taken directly out of his monthly pay and sent directly to you.
2. It is too late to bring any charges against him.
3. You would not be able to take your daughter or your grandchild as deductions on your income tax returns because she is married and her husband will use them as deductions on his income tax, so, you would only be inviting an audit by the Internal Revenue Service and you will be incurring penalties and interest on the amount which you should not have taken as deductions.
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