Does the groom's sister have to be one of the bridesmaids? What if she and the bride don't get along — what is the right thing to do?
Answer:There is no rule that states that you have to ask the groom's sister to be one of your bridesmaids.
Your attendants should be close friends who will be able to support you on this important day. I would suggest that if you feel you must include the groom's sister in your wedding, you could do so by asking her to do a reading at the ceremony or to act as an usher. You could also provide her with a corsage to make her feel more involved.