Wedding Etiquette: Mother Of The Bride's Responsibilities
Primarily, the mother of the bride can be the master planner of the wedding. Once the bride approves who the wedding participants are – the maid of honor, bridesmaids, best man, groomsmen, etc. - her mother will need to set up a schedule for them to meet, integrate their ideas, and designate each of their responsibilities if her daughter and her fiance permits. She may need frequent conversation with them to monitor how everything is moving.
The mother initially discusses the overall cost of the wedding with the couple including what she is willing to pay and the ideal number of guests. She quickly draw up the guest list for your side of the family, and later, close to the date of the wedding, call any of your guests who are late in RSVPing.
She is responsible in  making some reservations for the venue if the wedding will be held at their place and hotel accommodation for out-town guests and relatives.  She also helps in choosing the wedding attire and the dress her daughter dreams of. She as well need to choose her own dress and inform the mother of groom as soon as possible about the style she has decided so that the groom's mother can pick the one that will compliment her choice.
The mother of the bride is required to attend the rehearsals and showers. In the ceremony, she may light the family candle on the altar, along with the mother of the groom. Possibly escort the bride down the aisle, and/or participate in other parts of the ceremony such as unity ceremonies. While at the reception, she acts as a hostess making sure that guests are comfortable. This also includes standing in the receiving line, sitting at the parents table, and making sure the bride has greeted all her guests.
Above all her responsibilities as the mother of the bride, she should be a warm listener, the chief cheer leader, the most constant giver of compliments, and otherwise, the best source of support. Nothing compares how a mother completes the bride on her wedding day. These may be some sort of simple tasks for you despite being a mother for her for several years.