Only he knows

Only he knows.
He doesn't want to know.
He doesn't care.
He knows what happens at night.
In the bedroom.
In he dark.
He knows what his father does.
He can't help his poor mother.
He doesn't know how.
Life was better when he didn't know.
He wants to tell someone.
He doesn't know who.
She need help from her only son.
The son she doesn't even get close to.
He won't help her.
He can't see.
Everything his father does to his mother.
The father that used to be good.
The father that used to love.
Only he knows.