Tell your sibling just what you expect from him or her in the future. Don't simply scream. Request that your brother or sister cease doing anything or describe exactly what behaviors you desire. "I'm assisting mum and dad with their transition into an assisted living facility, and I need your assistance researching the locations," for example. It may be helpful to write down your expectations of each other's behavior. It's important to be clear about what you want to happen between you and your sibling. If you aren't sure how to go about it, try using some of these tips: Ask for help. If you're not sure how to proceed, ask someone for advice. Your parents might have some ideas if they're around. Otherwise, check with friends or family members who've been through something similar. They might be able to give you some pointers. Bargain with them. If you both agree that ending the relationship is best for all parties involved, then bargaining over the details can help reduce any tension between you. For example, you could bargain over financial responsibilities or decision-making rights. Give them time. In some cases, it might be better to let things cool off before trying to fix a problem with your sibling. Sometimes things that seemed like such big issues when you were kids will seem trivial once you get older.