Hi Will, How does your sister treat you when she doesn't have friends over? If she is mean to you then at least some of her friends will see how she acts and act the same way. If she is not mean and some of her friends are, then she should tell her friends to quit acting that way. You might need help from your parents on that. Some older kids, especially teenagers, just don't like having younger kids around so they pick on them or act mean to them. Wetting the bed is probably not what causes them to act that way, it's just an excuse to make fun of you. If your sister has friends over for weeks at a time you won't be able to hide your bedwetting, so I wouldn't even try. Sooner or later they will see sheets in the laundry every day, diapers, plastic pants, or whatever you use, and figure out what your problem is. If they say anything to you just tell them that it's your problem and you are dealing with it.