18 year olds can and do serve in the military.

When I was 18 I was halfway through my freshman year in college. I'd realized that there was an incredible amount my parents didn't know.

My parents wouldn't have dared defend me against an unfair attack similar to this, in private or public. However they wouldn't have had to do this since by the time I was about 13 they'd taught me to defend myself verbally and physically.

I know that's just me. But why do you think Bristol isn't demanding her mother shut up about this and dealing with it as she chooses?