Complex sentence: R.C. tells Kenny that even though Antoine is dead, Kenny's still letting him run his life, to which Kenny tells her she doesn't understand how hard it's been for him to live his life without his brother.
Split into simpler sentences: R.C. tells Kenny that even though Antoine is dead, Kenny's still letting him run his life. To which Kenny tells her she doesn't understand how hard it's been for him to live his life without his brother.