In search of motivation this AM at the gym, I thought about all the reasons I go. Primarily, I get off on being able to restrain her with my bare hands. The tighter I hold her, more she moans and the wetter she gets.
Your bully has vowed to continue holding you by the hair and forcing you to watch him nut in your sister until you thank him afterward, but you keep refusing. Luckily he's not around at night to hear you moaning "thankyousirthankyouthank..." while you rub