Well in my family my sister is ok to be totally naked in front of my mum so I don't see a problem there.
Underwear is basically just like a bikini anyway so I wouldn't worry about that but being naked in front of your dad at 15 is strange and i'd be mortified if my dad saw me naked!
Underwear is basically just like a bikini anyway so I wouldn't worry about that but being naked in front of your dad at 15 is strange and i'd be mortified if my dad saw me naked!