Nappies, or diapers, are used when a person is not in control of their bodily functions. If your 28 year old sister is still in nappies, it is likely that she cannot control her elimination functions and does not know when she needs to use the bathroom.
does she still were nappies if so this could be because she is not used to toilets yet if not she could be constipated check with your doctor
Only with parental permission and then her parents are still responsible for her.
yes
he doesn't have a 15 year old sister. :)
no my sister did
legally, i think so, but it depends on how mature they are
yes they will have to be brothers or sister yes they will have to be brothers or sister
why not yes i am 11 and i wear them dont u just love it when u sit down and it goes squelch
No
tell on them
49
As long as you do it as brother and sister and not as lovers, yes.