Try to think of a disagreement or agreement you've EVER had with a family member. Even if you are exaggeration or making a bit of it up I believe it to be fine. Write about something simple like disagreement over the last cookie or bed time.
Answer:
chores, homework, a job, ect...
Explanation:
♥ Your answer is "i'm"
♥ The object in this sentence is "you"
♥Hope this helps!♥
I would say "between" because it is a preposition.