Im a brahmin lady. I have a doubt whether married women should fast on amavasai day along with the husband?

Answer: There is nothing wrong if one fasting on Amavasya or any other day husband performs Tharpanam. A day prior to Srardham, all the fifteen days of Mahalaya Paksham known as Pithru paksha, every Sangramana day (Masapirappu) , Eclipse days iz. Surya Grahana & Chandra Grahana days are also the days for fasting for those who perform Tharpanam.