My Step-Mom Challenges me to Arm Wrestling

Description: So my step-mom constantly bitches that i don't do the household chores.  i don't get it, i am in college, i have a job, i don't have time for that and working out.  one day she absolutely loses her mind, storms into my room, and challenges me to an arm wrestling bet.  if i win, no more chores, if she wins i do chores without complaint forever.  somehow, she beats me.  my mind is blown, because i am way stronger than her.  she lets me do a re-match, again, and again.  she beats me with both arms, her pinkies, with me using both hands, with me using all my weight.  all the while she has her perfect tits in my face and once she realizes that i am getting a little turned on she just humiliates me as she continues to destroy me in arm wrestling.  how is she so strong?!