A:
Sending some money to your old father is an act of gratitude and kindness to him, most especially if he needs money. Allah (Glorified and Exalted be He) enjoins children to be grateful to their parents saying:
And your Lord has decreed that you worship none but Him. And that you be dutiful to your parents.
Your husband has no right to prevent you from giving your father your money and you do not have to obey him. (Part No. 25; Page No. 180) May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.