Family Issues Support Group
Family issues is a huge range that go from minor conflict to major misbehaviour and even abuse on the part of individual members of the family occur. Whether you feel you are in a dysfunctional family or you're dealing with a very specific issue, this is the place to talk about it and find others who might be going through the same thing.
If you feel comfortable enough to let your brothers visit the graves then you call the shots letting them know when and if they can as you can make arrangements to not be around if they decide to visit the graves. If letting them come to visit the graves makes you uneasy then do not let them come around until you are ready. Since you mentioned they have not visited the grave sites in 15 years I see no reason to make any quick decisions regarding this matter.
Take the time to sort your feelings out first and when you do I think making that decision whatever it will be will leave you feeling peaceful. Take care of you first before you deal with anything else. Wishing you the very best.:)
Thank you for your advice and understanding.