Is the husband obligated to give his wife a monthly sum of money as an allowance, given that he fulfills all her other needs?

The wife is not entitled to maintenance except after consummation or enabling it. If you have contracted the marriage but have not enabled your husband to consummate it, then you are not entitled to maintenance. If consummation or enabling it occurs, whether before or after the wedding, then you are entitled to maintenance according to what is customary. You have the option between receiving an allowance or having your husband personally purchase your needs. This is obligatory from the time of enabling consummation.