I am familiar with your situation. Be the instrument of change in your family. Apologize for any part that you were a part of. Talk to the minister or priest about bringing up that your mother would want a family reconciliation. Have fait in God. Invite Him into your lives. Sometimes we need to take things slow with siblings and others. Give them each a call in a couple of weeks to ask how they are doing. Small steps can make for big changes. My prayers are with you to be strong. I am so sorry for your loss of your mom.