Sayyiduna Abu Hurayrah (may Allah be pleased with him) said concerning a woman who gives charity from her husband's house: She may only give from her own food, and the reward will be for both of them. Otherwise it is not permissible for her to give charity from her husband's wealth without his permission.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الزكاة / 7853